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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> * Written by Doug Lea with assistance from members of JCP JSR-166</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> * Expert Group and released to the public domain, as explained at</em>
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> * <a href="http://creativecommons.org/licenses/publicdomain" target="alexandria_uri">http://creativecommons.org/licenses/publicdomain</a></em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.util.internal;
<a class="jxr_linenumber" name="22" href="#22">22</a>  
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.util.AbstractCollection;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.AbstractMap;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.util.AbstractSet;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.util.Arrays;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.util.Collection;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.util.ConcurrentModificationException;
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> java.util.Enumeration;
<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> java.util.Hashtable;
<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> java.util.Iterator;
<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> java.util.Map;
<a class="jxr_linenumber" name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> java.util.NoSuchElementException;
<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
<a class="jxr_linenumber" name="35" href="#35">35</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.ConcurrentHashMap;
<a class="jxr_linenumber" name="36" href="#36">36</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.ConcurrentMap;
<a class="jxr_linenumber" name="37" href="#37">37</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.locks.ReentrantLock;
<a class="jxr_linenumber" name="38" href="#38">38</a>  
<a class="jxr_linenumber" name="39" href="#39">39</a>  
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> * An alternative identity-comparing {@link ConcurrentMap} which is similar to</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * {@link ConcurrentHashMap}.</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * @param &lt;K&gt; the type of keys maintained by this map</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * @param &lt;V&gt; the type of mapped values</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> ConcurrentIdentityHashMap&lt;K, V&gt; <strong class="jxr_keyword">extends</strong> AbstractMap&lt;K, V&gt;
<a class="jxr_linenumber" name="47" href="#47">47</a>          <strong class="jxr_keyword">implements</strong> ConcurrentMap&lt;K, V&gt; {
<a class="jxr_linenumber" name="48" href="#48">48</a>  
<a class="jxr_linenumber" name="49" href="#49">49</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment">     * The default initial capacity for this table, used when not otherwise</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment">     * specified in a constructor.</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DEFAULT_INITIAL_CAPACITY = 16;
<a class="jxr_linenumber" name="54" href="#54">54</a>  
<a class="jxr_linenumber" name="55" href="#55">55</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment">     * The default load factor for this table, used when not otherwise specified</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment">     * in a constructor.</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">float</strong> DEFAULT_LOAD_FACTOR = 0.75f;
<a class="jxr_linenumber" name="60" href="#60">60</a>  
<a class="jxr_linenumber" name="61" href="#61">61</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>  <em class="jxr_javadoccomment">     * The default concurrency level for this table, used when not otherwise</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment">     * specified in a constructor.</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DEFAULT_CONCURRENCY_LEVEL = 16;
<a class="jxr_linenumber" name="66" href="#66">66</a>  
<a class="jxr_linenumber" name="67" href="#67">67</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment">     * The maximum capacity, used if a higher value is implicitly specified by</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment">     * either of the constructors with arguments.  MUST be a power of two</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment">     * &amp;lt;= 1&amp;lt;&amp;lt;30 to ensure that entries are indexable using integers.</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MAXIMUM_CAPACITY = 1 &lt;&lt; 30;
<a class="jxr_linenumber" name="73" href="#73">73</a>  
<a class="jxr_linenumber" name="74" href="#74">74</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment">     * The maximum number of segments to allow; used to bound constructor</em>
<a class="jxr_linenumber" name="76" href="#76">76</a>  <em class="jxr_javadoccomment">     * arguments.</em>
<a class="jxr_linenumber" name="77" href="#77">77</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="78" href="#78">78</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MAX_SEGMENTS = 1 &lt;&lt; 16; <em class="jxr_comment">// slightly conservative</em>
<a class="jxr_linenumber" name="79" href="#79">79</a>  
<a class="jxr_linenumber" name="80" href="#80">80</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment">     * Number of unsynchronized retries in size and containsValue methods before</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>  <em class="jxr_javadoccomment">     * resorting to locking. This is used to avoid unbounded retries if tables</em>
<a class="jxr_linenumber" name="83" href="#83">83</a>  <em class="jxr_javadoccomment">     * undergo continuous modification which would make it impossible to obtain</em>
<a class="jxr_linenumber" name="84" href="#84">84</a>  <em class="jxr_javadoccomment">     * an accurate result.</em>
<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="86" href="#86">86</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> RETRIES_BEFORE_LOCK = 2;
<a class="jxr_linenumber" name="87" href="#87">87</a>  
<a class="jxr_linenumber" name="88" href="#88">88</a>      <em class="jxr_comment">/*<em class="jxr_comment"> ---------------- Fields -------------- */</em></em>
<a class="jxr_linenumber" name="89" href="#89">89</a>  
<a class="jxr_linenumber" name="90" href="#90">90</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment">     * Mask value for indexing into segments. The upper bits of a key's hash</em>
<a class="jxr_linenumber" name="92" href="#92">92</a>  <em class="jxr_javadoccomment">     * code are used to choose the segment.</em>
<a class="jxr_linenumber" name="93" href="#93">93</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="94" href="#94">94</a>      <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> segmentMask;
<a class="jxr_linenumber" name="95" href="#95">95</a>  
<a class="jxr_linenumber" name="96" href="#96">96</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="97" href="#97">97</a>  <em class="jxr_javadoccomment">     * Shift value for indexing within segments.</em>
<a class="jxr_linenumber" name="98" href="#98">98</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="99" href="#99">99</a>      <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> segmentShift;
<a class="jxr_linenumber" name="100" href="#100">100</a> 
<a class="jxr_linenumber" name="101" href="#101">101</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="102" href="#102">102</a> <em class="jxr_javadoccomment">     * The segments, each of which is a specialized hash table</em>
<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="104" href="#104">104</a>     <strong class="jxr_keyword">final</strong> Segment&lt;K, V&gt;[] segments;
<a class="jxr_linenumber" name="105" href="#105">105</a> 
<a class="jxr_linenumber" name="106" href="#106">106</a>     Set&lt;K&gt; keySet;
<a class="jxr_linenumber" name="107" href="#107">107</a>     Set&lt;Map.Entry&lt;K, V&gt;&gt; entrySet;
<a class="jxr_linenumber" name="108" href="#108">108</a>     Collection&lt;V&gt; values;
<a class="jxr_linenumber" name="109" href="#109">109</a> 
<a class="jxr_linenumber" name="110" href="#110">110</a>     <em class="jxr_comment">/*<em class="jxr_comment"> ---------------- Small Utilities -------------- */</em></em>
<a class="jxr_linenumber" name="111" href="#111">111</a> 
<a class="jxr_linenumber" name="112" href="#112">112</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="113" href="#113">113</a> <em class="jxr_javadoccomment">     * Applies a supplemental hash function to a given hashCode, which defends</em>
<a class="jxr_linenumber" name="114" href="#114">114</a> <em class="jxr_javadoccomment">     * against poor quality hash functions.  This is critical because</em>
<a class="jxr_linenumber" name="115" href="#115">115</a> <em class="jxr_javadoccomment">     * ConcurrentReferenceHashMap uses power-of-two length hash tables, that</em>
<a class="jxr_linenumber" name="116" href="#116">116</a> <em class="jxr_javadoccomment">     * otherwise encounter collisions for hashCodes that do not differ in lower</em>
<a class="jxr_linenumber" name="117" href="#117">117</a> <em class="jxr_javadoccomment">     * or upper bits.</em>
<a class="jxr_linenumber" name="118" href="#118">118</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="119" href="#119">119</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> hash(<strong class="jxr_keyword">int</strong> h) {
<a class="jxr_linenumber" name="120" href="#120">120</a>         <em class="jxr_comment">// Spread bits to regularize both segment and index locations,</em>
<a class="jxr_linenumber" name="121" href="#121">121</a>         <em class="jxr_comment">// using variant of single-word Wang/Jenkins hash.</em>
<a class="jxr_linenumber" name="122" href="#122">122</a>         h += h &lt;&lt; 15 ^ 0xffffcd7d;
<a class="jxr_linenumber" name="123" href="#123">123</a>         h ^= h &gt;&gt;&gt; 10;
<a class="jxr_linenumber" name="124" href="#124">124</a>         h += h &lt;&lt; 3;
<a class="jxr_linenumber" name="125" href="#125">125</a>         h ^= h &gt;&gt;&gt; 6;
<a class="jxr_linenumber" name="126" href="#126">126</a>         h += (h &lt;&lt; 2) + (h &lt;&lt; 14);
<a class="jxr_linenumber" name="127" href="#127">127</a>         <strong class="jxr_keyword">return</strong> h ^ h &gt;&gt;&gt; 16;
<a class="jxr_linenumber" name="128" href="#128">128</a>     }
<a class="jxr_linenumber" name="129" href="#129">129</a> 
<a class="jxr_linenumber" name="130" href="#130">130</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="131" href="#131">131</a> <em class="jxr_javadoccomment">     * Returns the segment that should be used for key with given hash.</em>
<a class="jxr_linenumber" name="132" href="#132">132</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="133" href="#133">133</a> <em class="jxr_javadoccomment">     * @param hash the hash code for the key</em>
<a class="jxr_linenumber" name="134" href="#134">134</a> <em class="jxr_javadoccomment">     * @return the segment</em>
<a class="jxr_linenumber" name="135" href="#135">135</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="136" href="#136">136</a>     Segment&lt;K, V&gt; segmentFor(<strong class="jxr_keyword">int</strong> hash) {
<a class="jxr_linenumber" name="137" href="#137">137</a>         <strong class="jxr_keyword">return</strong> segments[hash &gt;&gt;&gt; segmentShift &amp; segmentMask];
<a class="jxr_linenumber" name="138" href="#138">138</a>     }
<a class="jxr_linenumber" name="139" href="#139">139</a> 
<a class="jxr_linenumber" name="140" href="#140">140</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> hashOf(Object key) {
<a class="jxr_linenumber" name="141" href="#141">141</a>         <strong class="jxr_keyword">return</strong> hash(System.identityHashCode(key));
<a class="jxr_linenumber" name="142" href="#142">142</a>     }
<a class="jxr_linenumber" name="143" href="#143">143</a> 
<a class="jxr_linenumber" name="144" href="#144">144</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="145" href="#145">145</a> <em class="jxr_javadoccomment">     * ConcurrentReferenceHashMap list entry. Note that this is never exported</em>
<a class="jxr_linenumber" name="146" href="#146">146</a> <em class="jxr_javadoccomment">     * out as a user-visible Map.Entry.</em>
<a class="jxr_linenumber" name="147" href="#147">147</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="148" href="#148">148</a> <em class="jxr_javadoccomment">     * Because the value field is volatile, not final, it is legal wrt</em>
<a class="jxr_linenumber" name="149" href="#149">149</a> <em class="jxr_javadoccomment">     * the Java Memory Model for an unsynchronized reader to see null</em>
<a class="jxr_linenumber" name="150" href="#150">150</a> <em class="jxr_javadoccomment">     * instead of initial value when read via a data race.  Although a</em>
<a class="jxr_linenumber" name="151" href="#151">151</a> <em class="jxr_javadoccomment">     * reordering leading to this is not likely to ever actually</em>
<a class="jxr_linenumber" name="152" href="#152">152</a> <em class="jxr_javadoccomment">     * occur, the Segment.readValueUnderLock method is used as a</em>
<a class="jxr_linenumber" name="153" href="#153">153</a> <em class="jxr_javadoccomment">     * backup in case a null (pre-initialized) value is ever seen in</em>
<a class="jxr_linenumber" name="154" href="#154">154</a> <em class="jxr_javadoccomment">     * an unsynchronized access method.</em>
<a class="jxr_linenumber" name="155" href="#155">155</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="156" href="#156">156</a>     <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> HashEntry&lt;K, V&gt; {
<a class="jxr_linenumber" name="157" href="#157">157</a>         <strong class="jxr_keyword">final</strong> Object key;
<a class="jxr_linenumber" name="158" href="#158">158</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> hash;
<a class="jxr_linenumber" name="159" href="#159">159</a>         <strong class="jxr_keyword">volatile</strong> Object value;
<a class="jxr_linenumber" name="160" href="#160">160</a>         <strong class="jxr_keyword">final</strong> HashEntry&lt;K, V&gt; next;
<a class="jxr_linenumber" name="161" href="#161">161</a> 
<a class="jxr_linenumber" name="162" href="#162">162</a>         <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">HashEntry</a>(
<a class="jxr_linenumber" name="163" href="#163">163</a>                 K key, <strong class="jxr_keyword">int</strong> hash, HashEntry&lt;K, V&gt; next, V value) {
<a class="jxr_linenumber" name="164" href="#164">164</a>             <strong class="jxr_keyword">this</strong>.hash = hash;
<a class="jxr_linenumber" name="165" href="#165">165</a>             <strong class="jxr_keyword">this</strong>.next = next;
<a class="jxr_linenumber" name="166" href="#166">166</a>             <strong class="jxr_keyword">this</strong>.key = key;
<a class="jxr_linenumber" name="167" href="#167">167</a>             <strong class="jxr_keyword">this</strong>.value = value;
<a class="jxr_linenumber" name="168" href="#168">168</a>         }
<a class="jxr_linenumber" name="169" href="#169">169</a> 
<a class="jxr_linenumber" name="170" href="#170">170</a>         @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a class="jxr_linenumber" name="171" href="#171">171</a>         K key() {
<a class="jxr_linenumber" name="172" href="#172">172</a>             <strong class="jxr_keyword">return</strong> (K) key;
<a class="jxr_linenumber" name="173" href="#173">173</a>         }
<a class="jxr_linenumber" name="174" href="#174">174</a> 
<a class="jxr_linenumber" name="175" href="#175">175</a>         @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a class="jxr_linenumber" name="176" href="#176">176</a>         V value() {
<a class="jxr_linenumber" name="177" href="#177">177</a>             <strong class="jxr_keyword">return</strong> (V) value;
<a class="jxr_linenumber" name="178" href="#178">178</a>         }
<a class="jxr_linenumber" name="179" href="#179">179</a> 
<a class="jxr_linenumber" name="180" href="#180">180</a>         <strong class="jxr_keyword">void</strong> setValue(V value) {
<a class="jxr_linenumber" name="181" href="#181">181</a>             <strong class="jxr_keyword">this</strong>.value = value;
<a class="jxr_linenumber" name="182" href="#182">182</a>         }
<a class="jxr_linenumber" name="183" href="#183">183</a> 
<a class="jxr_linenumber" name="184" href="#184">184</a>         @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a class="jxr_linenumber" name="185" href="#185">185</a>         <strong class="jxr_keyword">static</strong> &lt;K, V&gt; HashEntry&lt;K, V&gt;[] newArray(<strong class="jxr_keyword">int</strong> i) {
<a class="jxr_linenumber" name="186" href="#186">186</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">HashEntry</a>[i];
<a class="jxr_linenumber" name="187" href="#187">187</a>         }
<a class="jxr_linenumber" name="188" href="#188">188</a>     }
<a class="jxr_linenumber" name="189" href="#189">189</a> 
<a class="jxr_linenumber" name="190" href="#190">190</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="191" href="#191">191</a> <em class="jxr_javadoccomment">     * Segments are specialized versions of hash tables.  This subclasses from</em>
<a class="jxr_linenumber" name="192" href="#192">192</a> <em class="jxr_javadoccomment">     * ReentrantLock opportunistically, just to simplify some locking and avoid</em>
<a class="jxr_linenumber" name="193" href="#193">193</a> <em class="jxr_javadoccomment">     * separate construction.</em>
<a class="jxr_linenumber" name="194" href="#194">194</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="195" href="#195">195</a>     <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> Segment&lt;K, V&gt; <strong class="jxr_keyword">extends</strong> ReentrantLock {
<a class="jxr_linenumber" name="196" href="#196">196</a>         <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="197" href="#197">197</a> <em class="jxr_comment">         * Segments maintain a table of entry lists that are ALWAYS kept in a</em>
<a class="jxr_linenumber" name="198" href="#198">198</a> <em class="jxr_comment">         * consistent state, so can be read without locking. Next fields of</em>
<a class="jxr_linenumber" name="199" href="#199">199</a> <em class="jxr_comment">         * nodes are immutable (final).  All list additions are performed at the</em>
<a class="jxr_linenumber" name="200" href="#200">200</a> <em class="jxr_comment">         * front of each bin. This makes it easy to check changes, and also fast</em>
<a class="jxr_linenumber" name="201" href="#201">201</a> <em class="jxr_comment">         * to traverse. When nodes would otherwise be changed, new nodes are</em>
<a class="jxr_linenumber" name="202" href="#202">202</a> <em class="jxr_comment">         * created to replace them. This works well for hash tables since the</em>
<a class="jxr_linenumber" name="203" href="#203">203</a> <em class="jxr_comment">         * bin lists tend to be short. (The average length is less than two for</em>
<a class="jxr_linenumber" name="204" href="#204">204</a> <em class="jxr_comment">         * the default load factor threshold.)</em>
<a class="jxr_linenumber" name="205" href="#205">205</a> <em class="jxr_comment">         *</em>
<a class="jxr_linenumber" name="206" href="#206">206</a> <em class="jxr_comment">         * Read operations can thus proceed without locking, but rely on</em>
<a class="jxr_linenumber" name="207" href="#207">207</a> <em class="jxr_comment">         * selected uses of volatiles to ensure that completed write operations</em>
<a class="jxr_linenumber" name="208" href="#208">208</a> <em class="jxr_comment">         * performed by other threads are noticed. For most purposes, the</em>
<a class="jxr_linenumber" name="209" href="#209">209</a> <em class="jxr_comment">         * "count" field, tracking the number of elements, serves as that</em>
<a class="jxr_linenumber" name="210" href="#210">210</a> <em class="jxr_comment">         * volatile variable ensuring visibility.  This is convenient because</em>
<a class="jxr_linenumber" name="211" href="#211">211</a> <em class="jxr_comment">         * this field needs to be read in many read operations anyway:</em>
<a class="jxr_linenumber" name="212" href="#212">212</a> <em class="jxr_comment">         *</em>
<a class="jxr_linenumber" name="213" href="#213">213</a> <em class="jxr_comment">         *   - All (unsynchronized) read operations must first read the</em>
<a class="jxr_linenumber" name="214" href="#214">214</a> <em class="jxr_comment">         *     "count" field, and should not look at table entries if</em>
<a class="jxr_linenumber" name="215" href="#215">215</a> <em class="jxr_comment">         *     it is 0.</em>
<a class="jxr_linenumber" name="216" href="#216">216</a> <em class="jxr_comment">         *</em>
<a class="jxr_linenumber" name="217" href="#217">217</a> <em class="jxr_comment">         *   - All (synchronized) write operations should write to</em>
<a class="jxr_linenumber" name="218" href="#218">218</a> <em class="jxr_comment">         *     the "count" field after structurally changing any bin.</em>
<a class="jxr_linenumber" name="219" href="#219">219</a> <em class="jxr_comment">         *     The operations must not take any action that could even</em>
<a class="jxr_linenumber" name="220" href="#220">220</a> <em class="jxr_comment">         *     momentarily cause a concurrent read operation to see</em>
<a class="jxr_linenumber" name="221" href="#221">221</a> <em class="jxr_comment">         *     inconsistent data. This is made easier by the nature of</em>
<a class="jxr_linenumber" name="222" href="#222">222</a> <em class="jxr_comment">         *     the read operations in Map. For example, no operation</em>
<a class="jxr_linenumber" name="223" href="#223">223</a> <em class="jxr_comment">         *     can reveal that the table has grown but the threshold</em>
<a class="jxr_linenumber" name="224" href="#224">224</a> <em class="jxr_comment">         *     has not yet been updated, so there are no atomicity</em>
<a class="jxr_linenumber" name="225" href="#225">225</a> <em class="jxr_comment">         *     requirements for this with respect to reads.</em>
<a class="jxr_linenumber" name="226" href="#226">226</a> <em class="jxr_comment">         *</em>
<a class="jxr_linenumber" name="227" href="#227">227</a> <em class="jxr_comment">         * As a guide, all critical volatile reads and writes to the count field</em>
<a class="jxr_linenumber" name="228" href="#228">228</a> <em class="jxr_comment">         * are marked in code comments.</em>
<a class="jxr_linenumber" name="229" href="#229">229</a> <em class="jxr_comment">         */</em>
<a class="jxr_linenumber" name="230" href="#230">230</a> 
<a class="jxr_linenumber" name="231" href="#231">231</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> serialVersionUID = 5207829234977119743L;
<a class="jxr_linenumber" name="232" href="#232">232</a> 
<a class="jxr_linenumber" name="233" href="#233">233</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="234" href="#234">234</a> <em class="jxr_javadoccomment">         * The number of elements in this segment's region.</em>
<a class="jxr_linenumber" name="235" href="#235">235</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="236" href="#236">236</a>         <strong class="jxr_keyword">transient</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">int</strong> count;
<a class="jxr_linenumber" name="237" href="#237">237</a> 
<a class="jxr_linenumber" name="238" href="#238">238</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="239" href="#239">239</a> <em class="jxr_javadoccomment">         * Number of updates that alter the size of the table. This is used</em>
<a class="jxr_linenumber" name="240" href="#240">240</a> <em class="jxr_javadoccomment">         * during bulk-read methods to make sure they see a consistent snapshot:</em>
<a class="jxr_linenumber" name="241" href="#241">241</a> <em class="jxr_javadoccomment">         * If modCounts change during a traversal of segments computing size or</em>
<a class="jxr_linenumber" name="242" href="#242">242</a> <em class="jxr_javadoccomment">         * checking containsValue, then we might have an inconsistent view of</em>
<a class="jxr_linenumber" name="243" href="#243">243</a> <em class="jxr_javadoccomment">         * state so (usually) must retry.</em>
<a class="jxr_linenumber" name="244" href="#244">244</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="245" href="#245">245</a>         <strong class="jxr_keyword">int</strong> modCount;
<a class="jxr_linenumber" name="246" href="#246">246</a> 
<a class="jxr_linenumber" name="247" href="#247">247</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="248" href="#248">248</a> <em class="jxr_javadoccomment">         * The table is rehashed when its size exceeds this threshold.</em>
<a class="jxr_linenumber" name="249" href="#249">249</a> <em class="jxr_javadoccomment">         * (The value of this field is always &lt;tt&gt;(capacity * loadFactor)&lt;/tt&gt;.)</em>
<a class="jxr_linenumber" name="250" href="#250">250</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="251" href="#251">251</a>         <strong class="jxr_keyword">int</strong> threshold;
<a class="jxr_linenumber" name="252" href="#252">252</a> 
<a class="jxr_linenumber" name="253" href="#253">253</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="254" href="#254">254</a> <em class="jxr_javadoccomment">         * The per-segment table.</em>
<a class="jxr_linenumber" name="255" href="#255">255</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="256" href="#256">256</a>         <strong class="jxr_keyword">transient</strong> <strong class="jxr_keyword">volatile</strong> HashEntry&lt;K, V&gt;[] table;
<a class="jxr_linenumber" name="257" href="#257">257</a> 
<a class="jxr_linenumber" name="258" href="#258">258</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="259" href="#259">259</a> <em class="jxr_javadoccomment">         * The load factor for the hash table.  Even though this value is same</em>
<a class="jxr_linenumber" name="260" href="#260">260</a> <em class="jxr_javadoccomment">         * for all segments, it is replicated to avoid needing links to outer</em>
<a class="jxr_linenumber" name="261" href="#261">261</a> <em class="jxr_javadoccomment">         * object.</em>
<a class="jxr_linenumber" name="262" href="#262">262</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="263" href="#263">263</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">float</strong> loadFactor;
<a class="jxr_linenumber" name="264" href="#264">264</a> 
<a class="jxr_linenumber" name="265" href="#265">265</a>         <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">Segment</a>(<strong class="jxr_keyword">int</strong> initialCapacity, <strong class="jxr_keyword">float</strong> lf) {
<a class="jxr_linenumber" name="266" href="#266">266</a>             loadFactor = lf;
<a class="jxr_linenumber" name="267" href="#267">267</a>             setTable(HashEntry.&lt;K, V&gt;newArray(initialCapacity));
<a class="jxr_linenumber" name="268" href="#268">268</a>         }
<a class="jxr_linenumber" name="269" href="#269">269</a> 
<a class="jxr_linenumber" name="270" href="#270">270</a>         @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a class="jxr_linenumber" name="271" href="#271">271</a>         <strong class="jxr_keyword">static</strong> &lt;K, V&gt; Segment&lt;K, V&gt;[] newArray(<strong class="jxr_keyword">int</strong> i) {
<a class="jxr_linenumber" name="272" href="#272">272</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">Segment</a>[i];
<a class="jxr_linenumber" name="273" href="#273">273</a>         }
<a class="jxr_linenumber" name="274" href="#274">274</a> 
<a class="jxr_linenumber" name="275" href="#275">275</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> keyEq(Object src, Object dest) {
<a class="jxr_linenumber" name="276" href="#276">276</a>             <strong class="jxr_keyword">return</strong> src == dest;
<a class="jxr_linenumber" name="277" href="#277">277</a>         }
<a class="jxr_linenumber" name="278" href="#278">278</a> 
<a class="jxr_linenumber" name="279" href="#279">279</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="280" href="#280">280</a> <em class="jxr_javadoccomment">         * Sets table to new HashEntry array. Call only while holding lock or in</em>
<a class="jxr_linenumber" name="281" href="#281">281</a> <em class="jxr_javadoccomment">         * constructor.</em>
<a class="jxr_linenumber" name="282" href="#282">282</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="283" href="#283">283</a>         <strong class="jxr_keyword">void</strong> setTable(HashEntry&lt;K, V&gt;[] newTable) {
<a class="jxr_linenumber" name="284" href="#284">284</a>             threshold = (<strong class="jxr_keyword">int</strong>) (newTable.length * loadFactor);
<a class="jxr_linenumber" name="285" href="#285">285</a>             table = newTable;
<a class="jxr_linenumber" name="286" href="#286">286</a>         }
<a class="jxr_linenumber" name="287" href="#287">287</a> 
<a class="jxr_linenumber" name="288" href="#288">288</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="289" href="#289">289</a> <em class="jxr_javadoccomment">         * Returns properly casted first entry of bin for given hash.</em>
<a class="jxr_linenumber" name="290" href="#290">290</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="291" href="#291">291</a>         HashEntry&lt;K, V&gt; getFirst(<strong class="jxr_keyword">int</strong> hash) {
<a class="jxr_linenumber" name="292" href="#292">292</a>             HashEntry&lt;K, V&gt;[] tab = table;
<a class="jxr_linenumber" name="293" href="#293">293</a>             <strong class="jxr_keyword">return</strong> tab[hash &amp; tab.length - 1];
<a class="jxr_linenumber" name="294" href="#294">294</a>         }
<a class="jxr_linenumber" name="295" href="#295">295</a> 
<a class="jxr_linenumber" name="296" href="#296">296</a>         HashEntry&lt;K, V&gt; newHashEntry(
<a class="jxr_linenumber" name="297" href="#297">297</a>                 K key, <strong class="jxr_keyword">int</strong> hash, HashEntry&lt;K, V&gt; next, V value) {
<a class="jxr_linenumber" name="298" href="#298">298</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> HashEntry&lt;K, V&gt;(key, hash, next, value);
<a class="jxr_linenumber" name="299" href="#299">299</a>         }
<a class="jxr_linenumber" name="300" href="#300">300</a> 
<a class="jxr_linenumber" name="301" href="#301">301</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="302" href="#302">302</a> <em class="jxr_javadoccomment">         * Reads value field of an entry under lock. Called if value field ever</em>
<a class="jxr_linenumber" name="303" href="#303">303</a> <em class="jxr_javadoccomment">         * appears to be null. This is possible only if a compiler happens to</em>
<a class="jxr_linenumber" name="304" href="#304">304</a> <em class="jxr_javadoccomment">         * reorder a HashEntry initialization with its table assignment, which</em>
<a class="jxr_linenumber" name="305" href="#305">305</a> <em class="jxr_javadoccomment">         * is legal under memory model but is not known to ever occur.</em>
<a class="jxr_linenumber" name="306" href="#306">306</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="307" href="#307">307</a>         V readValueUnderLock(HashEntry&lt;K, V&gt; e) {
<a class="jxr_linenumber" name="308" href="#308">308</a>             lock();
<a class="jxr_linenumber" name="309" href="#309">309</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="310" href="#310">310</a>                 <strong class="jxr_keyword">return</strong> e.value();
<a class="jxr_linenumber" name="311" href="#311">311</a>             } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="312" href="#312">312</a>                 unlock();
<a class="jxr_linenumber" name="313" href="#313">313</a>             }
<a class="jxr_linenumber" name="314" href="#314">314</a>         }
<a class="jxr_linenumber" name="315" href="#315">315</a> 
<a class="jxr_linenumber" name="316" href="#316">316</a>         <em class="jxr_comment">/*<em class="jxr_comment"> Specialized implementations of map methods */</em></em>
<a class="jxr_linenumber" name="317" href="#317">317</a> 
<a class="jxr_linenumber" name="318" href="#318">318</a>         V get(Object key, <strong class="jxr_keyword">int</strong> hash) {
<a class="jxr_linenumber" name="319" href="#319">319</a>             <strong class="jxr_keyword">if</strong> (count != 0) { <em class="jxr_comment">// read-volatile</em>
<a class="jxr_linenumber" name="320" href="#320">320</a>                 HashEntry&lt;K, V&gt;[] tab = table;
<a class="jxr_linenumber" name="321" href="#321">321</a>                 HashEntry&lt;K, V&gt; e = tab[hash &amp; tab.length - 1];
<a class="jxr_linenumber" name="322" href="#322">322</a>                 <strong class="jxr_keyword">if</strong> (tab != table) {
<a class="jxr_linenumber" name="323" href="#323">323</a>                     <strong class="jxr_keyword">return</strong> get(key, hash);
<a class="jxr_linenumber" name="324" href="#324">324</a>                 }
<a class="jxr_linenumber" name="325" href="#325">325</a>                 <strong class="jxr_keyword">while</strong> (e != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="326" href="#326">326</a>                     <strong class="jxr_keyword">if</strong> (e.hash == hash &amp;&amp; keyEq(key, e.key())) {
<a class="jxr_linenumber" name="327" href="#327">327</a>                         V opaque = e.value();
<a class="jxr_linenumber" name="328" href="#328">328</a>                         <strong class="jxr_keyword">if</strong> (opaque != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="329" href="#329">329</a>                             <strong class="jxr_keyword">return</strong> opaque;
<a class="jxr_linenumber" name="330" href="#330">330</a>                         }
<a class="jxr_linenumber" name="331" href="#331">331</a> 
<a class="jxr_linenumber" name="332" href="#332">332</a>                         <strong class="jxr_keyword">return</strong> readValueUnderLock(e); <em class="jxr_comment">// recheck</em>
<a class="jxr_linenumber" name="333" href="#333">333</a>                     }
<a class="jxr_linenumber" name="334" href="#334">334</a>                     e = e.next;
<a class="jxr_linenumber" name="335" href="#335">335</a>                 }
<a class="jxr_linenumber" name="336" href="#336">336</a>             }
<a class="jxr_linenumber" name="337" href="#337">337</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="338" href="#338">338</a>         }
<a class="jxr_linenumber" name="339" href="#339">339</a> 
<a class="jxr_linenumber" name="340" href="#340">340</a>         <strong class="jxr_keyword">boolean</strong> containsKey(Object key, <strong class="jxr_keyword">int</strong> hash) {
<a class="jxr_linenumber" name="341" href="#341">341</a>             <strong class="jxr_keyword">if</strong> (count != 0) { <em class="jxr_comment">// read-volatile</em>
<a class="jxr_linenumber" name="342" href="#342">342</a>                 HashEntry&lt;K, V&gt;[] tab = table;
<a class="jxr_linenumber" name="343" href="#343">343</a>                 HashEntry&lt;K, V&gt; e = tab[hash &amp; tab.length - 1];
<a class="jxr_linenumber" name="344" href="#344">344</a>                 <strong class="jxr_keyword">if</strong> (tab != table) {
<a class="jxr_linenumber" name="345" href="#345">345</a>                     <strong class="jxr_keyword">return</strong> containsKey(key, hash);
<a class="jxr_linenumber" name="346" href="#346">346</a>                 }
<a class="jxr_linenumber" name="347" href="#347">347</a>                 <strong class="jxr_keyword">while</strong> (e != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="348" href="#348">348</a>                     <strong class="jxr_keyword">if</strong> (e.hash == hash &amp;&amp; keyEq(key, e.key())) {
<a class="jxr_linenumber" name="349" href="#349">349</a>                         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="350" href="#350">350</a>                     }
<a class="jxr_linenumber" name="351" href="#351">351</a>                     e = e.next;
<a class="jxr_linenumber" name="352" href="#352">352</a>                 }
<a class="jxr_linenumber" name="353" href="#353">353</a>             }
<a class="jxr_linenumber" name="354" href="#354">354</a>             <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="355" href="#355">355</a>         }
<a class="jxr_linenumber" name="356" href="#356">356</a> 
<a class="jxr_linenumber" name="357" href="#357">357</a>         <strong class="jxr_keyword">boolean</strong> containsValue(Object value) {
<a class="jxr_linenumber" name="358" href="#358">358</a>             <strong class="jxr_keyword">if</strong> (count != 0) { <em class="jxr_comment">// read-volatile</em>
<a class="jxr_linenumber" name="359" href="#359">359</a>                 HashEntry&lt;K, V&gt;[] tab = table;
<a class="jxr_linenumber" name="360" href="#360">360</a>                 <strong class="jxr_keyword">for</strong> (HashEntry&lt;K, V&gt; e: tab) {
<a class="jxr_linenumber" name="361" href="#361">361</a>                     <strong class="jxr_keyword">for</strong> (; e != <strong class="jxr_keyword">null</strong>; e = e.next) {
<a class="jxr_linenumber" name="362" href="#362">362</a>                         V opaque = e.value();
<a class="jxr_linenumber" name="363" href="#363">363</a>                         V v;
<a class="jxr_linenumber" name="364" href="#364">364</a> 
<a class="jxr_linenumber" name="365" href="#365">365</a>                         <strong class="jxr_keyword">if</strong> (opaque == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="366" href="#366">366</a>                             v = readValueUnderLock(e); <em class="jxr_comment">// recheck</em>
<a class="jxr_linenumber" name="367" href="#367">367</a>                         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="368" href="#368">368</a>                             v = opaque;
<a class="jxr_linenumber" name="369" href="#369">369</a>                         }
<a class="jxr_linenumber" name="370" href="#370">370</a> 
<a class="jxr_linenumber" name="371" href="#371">371</a>                         <strong class="jxr_keyword">if</strong> (value.equals(v)) {
<a class="jxr_linenumber" name="372" href="#372">372</a>                             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="373" href="#373">373</a>                         }
<a class="jxr_linenumber" name="374" href="#374">374</a>                     }
<a class="jxr_linenumber" name="375" href="#375">375</a>                 }
<a class="jxr_linenumber" name="376" href="#376">376</a>                 <strong class="jxr_keyword">if</strong> (table != tab) {
<a class="jxr_linenumber" name="377" href="#377">377</a>                     <strong class="jxr_keyword">return</strong> containsValue(value);
<a class="jxr_linenumber" name="378" href="#378">378</a>                 }
<a class="jxr_linenumber" name="379" href="#379">379</a>             }
<a class="jxr_linenumber" name="380" href="#380">380</a>             <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="381" href="#381">381</a>         }
<a class="jxr_linenumber" name="382" href="#382">382</a> 
<a class="jxr_linenumber" name="383" href="#383">383</a>         <strong class="jxr_keyword">boolean</strong> replace(K key, <strong class="jxr_keyword">int</strong> hash, V oldValue, V newValue) {
<a class="jxr_linenumber" name="384" href="#384">384</a>             lock();
<a class="jxr_linenumber" name="385" href="#385">385</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="386" href="#386">386</a>                 HashEntry&lt;K, V&gt; e = getFirst(hash);
<a class="jxr_linenumber" name="387" href="#387">387</a>                 <strong class="jxr_keyword">while</strong> (e != <strong class="jxr_keyword">null</strong> &amp;&amp; (e.hash != hash || !keyEq(key, e.key()))) {
<a class="jxr_linenumber" name="388" href="#388">388</a>                     e = e.next;
<a class="jxr_linenumber" name="389" href="#389">389</a>                 }
<a class="jxr_linenumber" name="390" href="#390">390</a> 
<a class="jxr_linenumber" name="391" href="#391">391</a>                 <strong class="jxr_keyword">boolean</strong> replaced = false;
<a class="jxr_linenumber" name="392" href="#392">392</a>                 <strong class="jxr_keyword">if</strong> (e != <strong class="jxr_keyword">null</strong> &amp;&amp; oldValue.equals(e.value())) {
<a class="jxr_linenumber" name="393" href="#393">393</a>                     replaced = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="394" href="#394">394</a>                     e.setValue(newValue);
<a class="jxr_linenumber" name="395" href="#395">395</a>                 }
<a class="jxr_linenumber" name="396" href="#396">396</a>                 <strong class="jxr_keyword">return</strong> replaced;
<a class="jxr_linenumber" name="397" href="#397">397</a>             } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="398" href="#398">398</a>                 unlock();
<a class="jxr_linenumber" name="399" href="#399">399</a>             }
<a class="jxr_linenumber" name="400" href="#400">400</a>         }
<a class="jxr_linenumber" name="401" href="#401">401</a> 
<a class="jxr_linenumber" name="402" href="#402">402</a>         V replace(K key, <strong class="jxr_keyword">int</strong> hash, V newValue) {
<a class="jxr_linenumber" name="403" href="#403">403</a>             lock();
<a class="jxr_linenumber" name="404" href="#404">404</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="405" href="#405">405</a>                 HashEntry&lt;K, V&gt; e = getFirst(hash);
<a class="jxr_linenumber" name="406" href="#406">406</a>                 <strong class="jxr_keyword">while</strong> (e != <strong class="jxr_keyword">null</strong> &amp;&amp; (e.hash != hash || !keyEq(key, e.key()))) {
<a class="jxr_linenumber" name="407" href="#407">407</a>                     e = e.next;
<a class="jxr_linenumber" name="408" href="#408">408</a>                 }
<a class="jxr_linenumber" name="409" href="#409">409</a> 
<a class="jxr_linenumber" name="410" href="#410">410</a>                 V oldValue = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="411" href="#411">411</a>                 <strong class="jxr_keyword">if</strong> (e != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="412" href="#412">412</a>                     oldValue = e.value();
<a class="jxr_linenumber" name="413" href="#413">413</a>                     e.setValue(newValue);
<a class="jxr_linenumber" name="414" href="#414">414</a>                 }
<a class="jxr_linenumber" name="415" href="#415">415</a>                 <strong class="jxr_keyword">return</strong> oldValue;
<a class="jxr_linenumber" name="416" href="#416">416</a>             } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="417" href="#417">417</a>                 unlock();
<a class="jxr_linenumber" name="418" href="#418">418</a>             }
<a class="jxr_linenumber" name="419" href="#419">419</a>         }
<a class="jxr_linenumber" name="420" href="#420">420</a> 
<a class="jxr_linenumber" name="421" href="#421">421</a>         V put(K key, <strong class="jxr_keyword">int</strong> hash, V value, <strong class="jxr_keyword">boolean</strong> onlyIfAbsent) {
<a class="jxr_linenumber" name="422" href="#422">422</a>             lock();
<a class="jxr_linenumber" name="423" href="#423">423</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="424" href="#424">424</a>                 <strong class="jxr_keyword">int</strong> c = count;
<a class="jxr_linenumber" name="425" href="#425">425</a>                 <strong class="jxr_keyword">if</strong> (c ++ &gt; threshold) { <em class="jxr_comment">// ensure capacity</em>
<a class="jxr_linenumber" name="426" href="#426">426</a>                     <strong class="jxr_keyword">int</strong> reduced = rehash();
<a class="jxr_linenumber" name="427" href="#427">427</a>                     <strong class="jxr_keyword">if</strong> (reduced &gt; 0) {
<a class="jxr_linenumber" name="428" href="#428">428</a>                         count = (c -= reduced) - 1; <em class="jxr_comment">// write-volatile</em>
<a class="jxr_linenumber" name="429" href="#429">429</a>                     }
<a class="jxr_linenumber" name="430" href="#430">430</a>                 }
<a class="jxr_linenumber" name="431" href="#431">431</a> 
<a class="jxr_linenumber" name="432" href="#432">432</a>                 HashEntry&lt;K, V&gt;[] tab = table;
<a class="jxr_linenumber" name="433" href="#433">433</a>                 <strong class="jxr_keyword">int</strong> index = hash &amp; tab.length - 1;
<a class="jxr_linenumber" name="434" href="#434">434</a>                 HashEntry&lt;K, V&gt; first = tab[index];
<a class="jxr_linenumber" name="435" href="#435">435</a>                 HashEntry&lt;K, V&gt; e = first;
<a class="jxr_linenumber" name="436" href="#436">436</a>                 <strong class="jxr_keyword">while</strong> (e != <strong class="jxr_keyword">null</strong> &amp;&amp; (e.hash != hash || !keyEq(key, e.key()))) {
<a class="jxr_linenumber" name="437" href="#437">437</a>                     e = e.next;
<a class="jxr_linenumber" name="438" href="#438">438</a>                 }
<a class="jxr_linenumber" name="439" href="#439">439</a> 
<a class="jxr_linenumber" name="440" href="#440">440</a>                 V oldValue;
<a class="jxr_linenumber" name="441" href="#441">441</a>                 <strong class="jxr_keyword">if</strong> (e != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="442" href="#442">442</a>                     oldValue = e.value();
<a class="jxr_linenumber" name="443" href="#443">443</a>                     <strong class="jxr_keyword">if</strong> (!onlyIfAbsent) {
<a class="jxr_linenumber" name="444" href="#444">444</a>                         e.setValue(value);
<a class="jxr_linenumber" name="445" href="#445">445</a>                     }
<a class="jxr_linenumber" name="446" href="#446">446</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="447" href="#447">447</a>                     oldValue = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="448" href="#448">448</a>                     ++ modCount;
<a class="jxr_linenumber" name="449" href="#449">449</a>                     tab[index] = newHashEntry(key, hash, first, value);
<a class="jxr_linenumber" name="450" href="#450">450</a>                     count = c; <em class="jxr_comment">// write-volatile</em>
<a class="jxr_linenumber" name="451" href="#451">451</a>                 }
<a class="jxr_linenumber" name="452" href="#452">452</a>                 <strong class="jxr_keyword">return</strong> oldValue;
<a class="jxr_linenumber" name="453" href="#453">453</a>             } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="454" href="#454">454</a>                 unlock();
<a class="jxr_linenumber" name="455" href="#455">455</a>             }
<a class="jxr_linenumber" name="456" href="#456">456</a>         }
<a class="jxr_linenumber" name="457" href="#457">457</a> 
<a class="jxr_linenumber" name="458" href="#458">458</a>         <strong class="jxr_keyword">int</strong> rehash() {
<a class="jxr_linenumber" name="459" href="#459">459</a>             HashEntry&lt;K, V&gt;[] oldTable = table;
<a class="jxr_linenumber" name="460" href="#460">460</a>             <strong class="jxr_keyword">int</strong> oldCapacity = oldTable.length;
<a class="jxr_linenumber" name="461" href="#461">461</a>             <strong class="jxr_keyword">if</strong> (oldCapacity &gt;= MAXIMUM_CAPACITY) {
<a class="jxr_linenumber" name="462" href="#462">462</a>                 <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="463" href="#463">463</a>             }
<a class="jxr_linenumber" name="464" href="#464">464</a> 
<a class="jxr_linenumber" name="465" href="#465">465</a>             <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="466" href="#466">466</a> <em class="jxr_comment">             * Reclassify nodes in each list to new Map.  Because we are using</em>
<a class="jxr_linenumber" name="467" href="#467">467</a> <em class="jxr_comment">             * power-of-two expansion, the elements from each bin must either</em>
<a class="jxr_linenumber" name="468" href="#468">468</a> <em class="jxr_comment">             * stay at same index, or move with a power of two offset. We</em>
<a class="jxr_linenumber" name="469" href="#469">469</a> <em class="jxr_comment">             * eliminate unnecessary node creation by catching cases where old</em>
<a class="jxr_linenumber" name="470" href="#470">470</a> <em class="jxr_comment">             * nodes can be reused because their next fields won't change.</em>
<a class="jxr_linenumber" name="471" href="#471">471</a> <em class="jxr_comment">             * Statistically, at the default threshold, only about one-sixth of</em>
<a class="jxr_linenumber" name="472" href="#472">472</a> <em class="jxr_comment">             * them need cloning when a table doubles. The nodes they replace</em>
<a class="jxr_linenumber" name="473" href="#473">473</a> <em class="jxr_comment">             * will be garbage collectable as soon as they are no longer</em>
<a class="jxr_linenumber" name="474" href="#474">474</a> <em class="jxr_comment">             * referenced by any reader thread that may be in the midst of</em>
<a class="jxr_linenumber" name="475" href="#475">475</a> <em class="jxr_comment">             * traversing table right now.</em>
<a class="jxr_linenumber" name="476" href="#476">476</a> <em class="jxr_comment">             */</em>
<a class="jxr_linenumber" name="477" href="#477">477</a> 
<a class="jxr_linenumber" name="478" href="#478">478</a>             HashEntry&lt;K, V&gt;[] newTable = HashEntry.newArray(oldCapacity &lt;&lt; 1);
<a class="jxr_linenumber" name="479" href="#479">479</a>             threshold = (<strong class="jxr_keyword">int</strong>) (newTable.length * loadFactor);
<a class="jxr_linenumber" name="480" href="#480">480</a>             <strong class="jxr_keyword">int</strong> sizeMask = newTable.length - 1;
<a class="jxr_linenumber" name="481" href="#481">481</a>             <strong class="jxr_keyword">int</strong> reduce = 0;
<a class="jxr_linenumber" name="482" href="#482">482</a>             <strong class="jxr_keyword">for</strong> (HashEntry&lt;K, V&gt; e: oldTable) {
<a class="jxr_linenumber" name="483" href="#483">483</a>                 <em class="jxr_comment">// We need to guarantee that any existing reads of old Map can</em>
<a class="jxr_linenumber" name="484" href="#484">484</a>                 <em class="jxr_comment">// proceed. So we cannot yet null out each bin.</em>
<a class="jxr_linenumber" name="485" href="#485">485</a>                 <strong class="jxr_keyword">if</strong> (e != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="486" href="#486">486</a>                     HashEntry&lt;K, V&gt; next = e.next;
<a class="jxr_linenumber" name="487" href="#487">487</a>                     <strong class="jxr_keyword">int</strong> idx = e.hash &amp; sizeMask;
<a class="jxr_linenumber" name="488" href="#488">488</a> 
<a class="jxr_linenumber" name="489" href="#489">489</a>                     <em class="jxr_comment">// Single node on list</em>
<a class="jxr_linenumber" name="490" href="#490">490</a>                     <strong class="jxr_keyword">if</strong> (next == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="491" href="#491">491</a>                         newTable[idx] = e;
<a class="jxr_linenumber" name="492" href="#492">492</a>                     } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="493" href="#493">493</a>                         <em class="jxr_comment">// Reuse trailing consecutive sequence at same slot</em>
<a class="jxr_linenumber" name="494" href="#494">494</a>                         HashEntry&lt;K, V&gt; lastRun = e;
<a class="jxr_linenumber" name="495" href="#495">495</a>                         <strong class="jxr_keyword">int</strong> lastIdx = idx;
<a class="jxr_linenumber" name="496" href="#496">496</a>                         <strong class="jxr_keyword">for</strong> (HashEntry&lt;K, V&gt; last = next; last != <strong class="jxr_keyword">null</strong>; last = last.next) {
<a class="jxr_linenumber" name="497" href="#497">497</a>                             <strong class="jxr_keyword">int</strong> k = last.hash &amp; sizeMask;
<a class="jxr_linenumber" name="498" href="#498">498</a>                             <strong class="jxr_keyword">if</strong> (k != lastIdx) {
<a class="jxr_linenumber" name="499" href="#499">499</a>                                 lastIdx = k;
<a class="jxr_linenumber" name="500" href="#500">500</a>                                 lastRun = last;
<a class="jxr_linenumber" name="501" href="#501">501</a>                             }
<a class="jxr_linenumber" name="502" href="#502">502</a>                         }
<a class="jxr_linenumber" name="503" href="#503">503</a>                         newTable[lastIdx] = lastRun;
<a class="jxr_linenumber" name="504" href="#504">504</a>                         <em class="jxr_comment">// Clone all remaining nodes</em>
<a class="jxr_linenumber" name="505" href="#505">505</a>                         <strong class="jxr_keyword">for</strong> (HashEntry&lt;K, V&gt; p = e; p != lastRun; p = p.next) {
<a class="jxr_linenumber" name="506" href="#506">506</a>                             <em class="jxr_comment">// Skip GC'd weak references</em>
<a class="jxr_linenumber" name="507" href="#507">507</a>                             K key = p.key();
<a class="jxr_linenumber" name="508" href="#508">508</a>                             <strong class="jxr_keyword">if</strong> (key == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="509" href="#509">509</a>                                 reduce++;
<a class="jxr_linenumber" name="510" href="#510">510</a>                                 <strong class="jxr_keyword">continue</strong>;
<a class="jxr_linenumber" name="511" href="#511">511</a>                             }
<a class="jxr_linenumber" name="512" href="#512">512</a>                             <strong class="jxr_keyword">int</strong> k = p.hash &amp; sizeMask;
<a class="jxr_linenumber" name="513" href="#513">513</a>                             HashEntry&lt;K, V&gt; n = newTable[k];
<a class="jxr_linenumber" name="514" href="#514">514</a>                             newTable[k] = newHashEntry(key, p.hash, n, p.value());
<a class="jxr_linenumber" name="515" href="#515">515</a>                         }
<a class="jxr_linenumber" name="516" href="#516">516</a>                     }
<a class="jxr_linenumber" name="517" href="#517">517</a>                 }
<a class="jxr_linenumber" name="518" href="#518">518</a>             }
<a class="jxr_linenumber" name="519" href="#519">519</a>             table = newTable;
<a class="jxr_linenumber" name="520" href="#520">520</a>             Arrays.fill(oldTable, <strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="521" href="#521">521</a>             <strong class="jxr_keyword">return</strong> reduce;
<a class="jxr_linenumber" name="522" href="#522">522</a>         }
<a class="jxr_linenumber" name="523" href="#523">523</a> 
<a class="jxr_linenumber" name="524" href="#524">524</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="525" href="#525">525</a> <em class="jxr_javadoccomment">         * Remove; match on key only if value null, else match both.</em>
<a class="jxr_linenumber" name="526" href="#526">526</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="527" href="#527">527</a>         V remove(Object key, <strong class="jxr_keyword">int</strong> hash, Object value, <strong class="jxr_keyword">boolean</strong> refRemove) {
<a class="jxr_linenumber" name="528" href="#528">528</a>             lock();
<a class="jxr_linenumber" name="529" href="#529">529</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="530" href="#530">530</a>                 <strong class="jxr_keyword">int</strong> c = count - 1;
<a class="jxr_linenumber" name="531" href="#531">531</a>                 HashEntry&lt;K, V&gt;[] tab = table;
<a class="jxr_linenumber" name="532" href="#532">532</a>                 <strong class="jxr_keyword">int</strong> index = hash &amp; tab.length - 1;
<a class="jxr_linenumber" name="533" href="#533">533</a>                 HashEntry&lt;K, V&gt; first = tab[index];
<a class="jxr_linenumber" name="534" href="#534">534</a>                 HashEntry&lt;K, V&gt; e = first;
<a class="jxr_linenumber" name="535" href="#535">535</a>                 <em class="jxr_comment">// a reference remove operation compares the Reference instance</em>
<a class="jxr_linenumber" name="536" href="#536">536</a>                 <strong class="jxr_keyword">while</strong> (e != <strong class="jxr_keyword">null</strong> &amp;&amp; key != e.key &amp;&amp;
<a class="jxr_linenumber" name="537" href="#537">537</a>                         (refRemove || hash != e.hash || !keyEq(key, e.key()))) {
<a class="jxr_linenumber" name="538" href="#538">538</a>                     e = e.next;
<a class="jxr_linenumber" name="539" href="#539">539</a>                 }
<a class="jxr_linenumber" name="540" href="#540">540</a> 
<a class="jxr_linenumber" name="541" href="#541">541</a>                 V oldValue = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="542" href="#542">542</a>                 <strong class="jxr_keyword">if</strong> (e != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="543" href="#543">543</a>                     V v = e.value();
<a class="jxr_linenumber" name="544" href="#544">544</a>                     <strong class="jxr_keyword">if</strong> (value == <strong class="jxr_keyword">null</strong> || value.equals(v)) {
<a class="jxr_linenumber" name="545" href="#545">545</a>                         oldValue = v;
<a class="jxr_linenumber" name="546" href="#546">546</a>                         <em class="jxr_comment">// All entries following removed node can stay in list,</em>
<a class="jxr_linenumber" name="547" href="#547">547</a>                         <em class="jxr_comment">// but all preceding ones need to be cloned.</em>
<a class="jxr_linenumber" name="548" href="#548">548</a>                         ++ modCount;
<a class="jxr_linenumber" name="549" href="#549">549</a>                         HashEntry&lt;K, V&gt; newFirst = e.next;
<a class="jxr_linenumber" name="550" href="#550">550</a>                         <strong class="jxr_keyword">for</strong> (HashEntry&lt;K, V&gt; p = first; p != e; p = p.next) {
<a class="jxr_linenumber" name="551" href="#551">551</a>                             K pKey = p.key();
<a class="jxr_linenumber" name="552" href="#552">552</a>                             <strong class="jxr_keyword">if</strong> (pKey == <strong class="jxr_keyword">null</strong>) { <em class="jxr_comment">// Skip GC'd keys</em>
<a class="jxr_linenumber" name="553" href="#553">553</a>                                 c --;
<a class="jxr_linenumber" name="554" href="#554">554</a>                                 <strong class="jxr_keyword">continue</strong>;
<a class="jxr_linenumber" name="555" href="#555">555</a>                             }
<a class="jxr_linenumber" name="556" href="#556">556</a> 
<a class="jxr_linenumber" name="557" href="#557">557</a>                             newFirst = newHashEntry(
<a class="jxr_linenumber" name="558" href="#558">558</a>                                     pKey, p.hash, newFirst, p.value());
<a class="jxr_linenumber" name="559" href="#559">559</a>                         }
<a class="jxr_linenumber" name="560" href="#560">560</a>                         tab[index] = newFirst;
<a class="jxr_linenumber" name="561" href="#561">561</a>                         count = c; <em class="jxr_comment">// write-volatile</em>
<a class="jxr_linenumber" name="562" href="#562">562</a>                     }
<a class="jxr_linenumber" name="563" href="#563">563</a>                 }
<a class="jxr_linenumber" name="564" href="#564">564</a>                 <strong class="jxr_keyword">return</strong> oldValue;
<a class="jxr_linenumber" name="565" href="#565">565</a>             } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="566" href="#566">566</a>                 unlock();
<a class="jxr_linenumber" name="567" href="#567">567</a>             }
<a class="jxr_linenumber" name="568" href="#568">568</a>         }
<a class="jxr_linenumber" name="569" href="#569">569</a> 
<a class="jxr_linenumber" name="570" href="#570">570</a>         <strong class="jxr_keyword">void</strong> clear() {
<a class="jxr_linenumber" name="571" href="#571">571</a>             <strong class="jxr_keyword">if</strong> (count != 0) {
<a class="jxr_linenumber" name="572" href="#572">572</a>                 lock();
<a class="jxr_linenumber" name="573" href="#573">573</a>                 <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="574" href="#574">574</a>                     HashEntry&lt;K, V&gt;[] tab = table;
<a class="jxr_linenumber" name="575" href="#575">575</a>                     <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; tab.length; i ++) {
<a class="jxr_linenumber" name="576" href="#576">576</a>                         tab[i] = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="577" href="#577">577</a>                     }
<a class="jxr_linenumber" name="578" href="#578">578</a>                     ++ modCount;
<a class="jxr_linenumber" name="579" href="#579">579</a>                     count = 0; <em class="jxr_comment">// write-volatile</em>
<a class="jxr_linenumber" name="580" href="#580">580</a>                 } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="581" href="#581">581</a>                     unlock();
<a class="jxr_linenumber" name="582" href="#582">582</a>                 }
<a class="jxr_linenumber" name="583" href="#583">583</a>             }
<a class="jxr_linenumber" name="584" href="#584">584</a>         }
<a class="jxr_linenumber" name="585" href="#585">585</a>     }
<a class="jxr_linenumber" name="586" href="#586">586</a> 
<a class="jxr_linenumber" name="587" href="#587">587</a>     <em class="jxr_comment">/*<em class="jxr_comment"> ---------------- Public operations -------------- */</em></em>
<a class="jxr_linenumber" name="588" href="#588">588</a> 
<a class="jxr_linenumber" name="589" href="#589">589</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="590" href="#590">590</a> <em class="jxr_javadoccomment">     * Creates a new, empty map with the specified initial capacity, load factor</em>
<a class="jxr_linenumber" name="591" href="#591">591</a> <em class="jxr_javadoccomment">     * and concurrency level.</em>
<a class="jxr_linenumber" name="592" href="#592">592</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="593" href="#593">593</a> <em class="jxr_javadoccomment">     * @param initialCapacity the initial capacity. The implementation performs</em>
<a class="jxr_linenumber" name="594" href="#594">594</a> <em class="jxr_javadoccomment">     *                        internal sizing to accommodate this many elements.</em>
<a class="jxr_linenumber" name="595" href="#595">595</a> <em class="jxr_javadoccomment">     * @param loadFactor the load factor threshold, used to control resizing.</em>
<a class="jxr_linenumber" name="596" href="#596">596</a> <em class="jxr_javadoccomment">     *                   Resizing may be performed when the average number of</em>
<a class="jxr_linenumber" name="597" href="#597">597</a> <em class="jxr_javadoccomment">     *                   elements per bin exceeds this threshold.</em>
<a class="jxr_linenumber" name="598" href="#598">598</a> <em class="jxr_javadoccomment">     * @param concurrencyLevel the estimated number of concurrently updating</em>
<a class="jxr_linenumber" name="599" href="#599">599</a> <em class="jxr_javadoccomment">     *                         threads. The implementation performs internal</em>
<a class="jxr_linenumber" name="600" href="#600">600</a> <em class="jxr_javadoccomment">     *                         sizing to try to accommodate this many threads.</em>
<a class="jxr_linenumber" name="601" href="#601">601</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the initial capacity is negative or</em>
<a class="jxr_linenumber" name="602" href="#602">602</a> <em class="jxr_javadoccomment">     *                                  the load factor or concurrencyLevel are</em>
<a class="jxr_linenumber" name="603" href="#603">603</a> <em class="jxr_javadoccomment">     *                                  nonpositive.</em>
<a class="jxr_linenumber" name="604" href="#604">604</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="605" href="#605">605</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityHashMap.html">ConcurrentIdentityHashMap</a>(
<a class="jxr_linenumber" name="606" href="#606">606</a>             <strong class="jxr_keyword">int</strong> initialCapacity, <strong class="jxr_keyword">float</strong> loadFactor,
<a class="jxr_linenumber" name="607" href="#607">607</a>             <strong class="jxr_keyword">int</strong> concurrencyLevel) {
<a class="jxr_linenumber" name="608" href="#608">608</a>         <strong class="jxr_keyword">if</strong> (!(loadFactor &gt; 0) || initialCapacity &lt; 0 || concurrencyLevel &lt;= 0) {
<a class="jxr_linenumber" name="609" href="#609">609</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException();
<a class="jxr_linenumber" name="610" href="#610">610</a>         }
<a class="jxr_linenumber" name="611" href="#611">611</a> 
<a class="jxr_linenumber" name="612" href="#612">612</a>         <strong class="jxr_keyword">if</strong> (concurrencyLevel &gt; MAX_SEGMENTS) {
<a class="jxr_linenumber" name="613" href="#613">613</a>             concurrencyLevel = MAX_SEGMENTS;
<a class="jxr_linenumber" name="614" href="#614">614</a>         }
<a class="jxr_linenumber" name="615" href="#615">615</a> 
<a class="jxr_linenumber" name="616" href="#616">616</a>         <em class="jxr_comment">// Find power-of-two sizes best matching arguments</em>
<a class="jxr_linenumber" name="617" href="#617">617</a>         <strong class="jxr_keyword">int</strong> sshift = 0;
<a class="jxr_linenumber" name="618" href="#618">618</a>         <strong class="jxr_keyword">int</strong> ssize = 1;
<a class="jxr_linenumber" name="619" href="#619">619</a>         <strong class="jxr_keyword">while</strong> (ssize &lt; concurrencyLevel) {
<a class="jxr_linenumber" name="620" href="#620">620</a>             ++ sshift;
<a class="jxr_linenumber" name="621" href="#621">621</a>             ssize &lt;&lt;= 1;
<a class="jxr_linenumber" name="622" href="#622">622</a>         }
<a class="jxr_linenumber" name="623" href="#623">623</a>         segmentShift = 32 - sshift;
<a class="jxr_linenumber" name="624" href="#624">624</a>         segmentMask = ssize - 1;
<a class="jxr_linenumber" name="625" href="#625">625</a>         segments = Segment.newArray(ssize);
<a class="jxr_linenumber" name="626" href="#626">626</a> 
<a class="jxr_linenumber" name="627" href="#627">627</a>         <strong class="jxr_keyword">if</strong> (initialCapacity &gt; MAXIMUM_CAPACITY) {
<a class="jxr_linenumber" name="628" href="#628">628</a>             initialCapacity = MAXIMUM_CAPACITY;
<a class="jxr_linenumber" name="629" href="#629">629</a>         }
<a class="jxr_linenumber" name="630" href="#630">630</a>         <strong class="jxr_keyword">int</strong> c = initialCapacity / ssize;
<a class="jxr_linenumber" name="631" href="#631">631</a>         <strong class="jxr_keyword">if</strong> (c * ssize &lt; initialCapacity) {
<a class="jxr_linenumber" name="632" href="#632">632</a>             ++ c;
<a class="jxr_linenumber" name="633" href="#633">633</a>         }
<a class="jxr_linenumber" name="634" href="#634">634</a>         <strong class="jxr_keyword">int</strong> cap = 1;
<a class="jxr_linenumber" name="635" href="#635">635</a>         <strong class="jxr_keyword">while</strong> (cap &lt; c) {
<a class="jxr_linenumber" name="636" href="#636">636</a>             cap &lt;&lt;= 1;
<a class="jxr_linenumber" name="637" href="#637">637</a>         }
<a class="jxr_linenumber" name="638" href="#638">638</a> 
<a class="jxr_linenumber" name="639" href="#639">639</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; segments.length; ++ i) {
<a class="jxr_linenumber" name="640" href="#640">640</a>             segments[i] = <strong class="jxr_keyword">new</strong> Segment&lt;K, V&gt;(cap, loadFactor);
<a class="jxr_linenumber" name="641" href="#641">641</a>         }
<a class="jxr_linenumber" name="642" href="#642">642</a>     }
<a class="jxr_linenumber" name="643" href="#643">643</a> 
<a class="jxr_linenumber" name="644" href="#644">644</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="645" href="#645">645</a> <em class="jxr_javadoccomment">     * Creates a new, empty map with the specified initial capacity and load</em>
<a class="jxr_linenumber" name="646" href="#646">646</a> <em class="jxr_javadoccomment">     * factor and with the default reference types (weak keys, strong values),</em>
<a class="jxr_linenumber" name="647" href="#647">647</a> <em class="jxr_javadoccomment">     * and concurrencyLevel (16).</em>
<a class="jxr_linenumber" name="648" href="#648">648</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="649" href="#649">649</a> <em class="jxr_javadoccomment">     * @param initialCapacity The implementation performs internal sizing to</em>
<a class="jxr_linenumber" name="650" href="#650">650</a> <em class="jxr_javadoccomment">     *                        accommodate this many elements.</em>
<a class="jxr_linenumber" name="651" href="#651">651</a> <em class="jxr_javadoccomment">     * @param loadFactor the load factor threshold, used to control resizing.</em>
<a class="jxr_linenumber" name="652" href="#652">652</a> <em class="jxr_javadoccomment">     *                   Resizing may be performed when the average number of</em>
<a class="jxr_linenumber" name="653" href="#653">653</a> <em class="jxr_javadoccomment">     *                   elements per bin exceeds this threshold.</em>
<a class="jxr_linenumber" name="654" href="#654">654</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the initial capacity of elements is</em>
<a class="jxr_linenumber" name="655" href="#655">655</a> <em class="jxr_javadoccomment">     *                                  negative or the load factor is</em>
<a class="jxr_linenumber" name="656" href="#656">656</a> <em class="jxr_javadoccomment">     *                                  nonpositive</em>
<a class="jxr_linenumber" name="657" href="#657">657</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="658" href="#658">658</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityHashMap.html">ConcurrentIdentityHashMap</a>(<strong class="jxr_keyword">int</strong> initialCapacity, <strong class="jxr_keyword">float</strong> loadFactor) {
<a class="jxr_linenumber" name="659" href="#659">659</a>         <strong class="jxr_keyword">this</strong>(initialCapacity, loadFactor, DEFAULT_CONCURRENCY_LEVEL);
<a class="jxr_linenumber" name="660" href="#660">660</a>     }
<a class="jxr_linenumber" name="661" href="#661">661</a> 
<a class="jxr_linenumber" name="662" href="#662">662</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="663" href="#663">663</a> <em class="jxr_javadoccomment">     * Creates a new, empty map with the specified initial capacity, and with</em>
<a class="jxr_linenumber" name="664" href="#664">664</a> <em class="jxr_javadoccomment">     * default reference types (weak keys, strong values), load factor (0.75)</em>
<a class="jxr_linenumber" name="665" href="#665">665</a> <em class="jxr_javadoccomment">     * and concurrencyLevel (16).</em>
<a class="jxr_linenumber" name="666" href="#666">666</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="667" href="#667">667</a> <em class="jxr_javadoccomment">     * @param initialCapacity the initial capacity. The implementation performs</em>
<a class="jxr_linenumber" name="668" href="#668">668</a> <em class="jxr_javadoccomment">     *                        internal sizing to accommodate this many elements.</em>
<a class="jxr_linenumber" name="669" href="#669">669</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the initial capacity of elements is</em>
<a class="jxr_linenumber" name="670" href="#670">670</a> <em class="jxr_javadoccomment">     *                                  negative.</em>
<a class="jxr_linenumber" name="671" href="#671">671</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="672" href="#672">672</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityHashMap.html">ConcurrentIdentityHashMap</a>(<strong class="jxr_keyword">int</strong> initialCapacity) {
<a class="jxr_linenumber" name="673" href="#673">673</a>         <strong class="jxr_keyword">this</strong>(initialCapacity, DEFAULT_LOAD_FACTOR, DEFAULT_CONCURRENCY_LEVEL);
<a class="jxr_linenumber" name="674" href="#674">674</a>     }
<a class="jxr_linenumber" name="675" href="#675">675</a> 
<a class="jxr_linenumber" name="676" href="#676">676</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="677" href="#677">677</a> <em class="jxr_javadoccomment">     * Creates a new, empty map with a default initial capacity (16), reference</em>
<a class="jxr_linenumber" name="678" href="#678">678</a> <em class="jxr_javadoccomment">     * types (weak keys, strong values), default load factor (0.75) and</em>
<a class="jxr_linenumber" name="679" href="#679">679</a> <em class="jxr_javadoccomment">     * concurrencyLevel (16).</em>
<a class="jxr_linenumber" name="680" href="#680">680</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="681" href="#681">681</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityHashMap.html">ConcurrentIdentityHashMap</a>() {
<a class="jxr_linenumber" name="682" href="#682">682</a>         <strong class="jxr_keyword">this</strong>(DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR, DEFAULT_CONCURRENCY_LEVEL);
<a class="jxr_linenumber" name="683" href="#683">683</a>     }
<a class="jxr_linenumber" name="684" href="#684">684</a> 
<a class="jxr_linenumber" name="685" href="#685">685</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="686" href="#686">686</a> <em class="jxr_javadoccomment">     * Creates a new map with the same mappings as the given map. The map is</em>
<a class="jxr_linenumber" name="687" href="#687">687</a> <em class="jxr_javadoccomment">     * created with a capacity of 1.5 times the number of mappings in the given</em>
<a class="jxr_linenumber" name="688" href="#688">688</a> <em class="jxr_javadoccomment">     * map or 16 (whichever is greater), and a default load factor (0.75) and</em>
<a class="jxr_linenumber" name="689" href="#689">689</a> <em class="jxr_javadoccomment">     * concurrencyLevel (16).</em>
<a class="jxr_linenumber" name="690" href="#690">690</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="691" href="#691">691</a> <em class="jxr_javadoccomment">     * @param m the map</em>
<a class="jxr_linenumber" name="692" href="#692">692</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="693" href="#693">693</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityHashMap.html">ConcurrentIdentityHashMap</a>(Map&lt;? <strong class="jxr_keyword">extends</strong> K, ? <strong class="jxr_keyword">extends</strong> V&gt; m) {
<a class="jxr_linenumber" name="694" href="#694">694</a>         <strong class="jxr_keyword">this</strong>(Math.max((<strong class="jxr_keyword">int</strong>) (m.size() / DEFAULT_LOAD_FACTOR) + 1,
<a class="jxr_linenumber" name="695" href="#695">695</a>              DEFAULT_INITIAL_CAPACITY), DEFAULT_LOAD_FACTOR,
<a class="jxr_linenumber" name="696" href="#696">696</a>              DEFAULT_CONCURRENCY_LEVEL);
<a class="jxr_linenumber" name="697" href="#697">697</a>         putAll(m);
<a class="jxr_linenumber" name="698" href="#698">698</a>     }
<a class="jxr_linenumber" name="699" href="#699">699</a> 
<a class="jxr_linenumber" name="700" href="#700">700</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="701" href="#701">701</a> <em class="jxr_javadoccomment">     * Returns &lt;tt&gt;true&lt;/tt&gt; if this map contains no key-value mappings.</em>
<a class="jxr_linenumber" name="702" href="#702">702</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="703" href="#703">703</a> <em class="jxr_javadoccomment">     * @return &lt;tt&gt;true&lt;/tt&gt; if this map contains no key-value mappings</em>
<a class="jxr_linenumber" name="704" href="#704">704</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="705" href="#705">705</a>     @Override
<a class="jxr_linenumber" name="706" href="#706">706</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isEmpty() {
<a class="jxr_linenumber" name="707" href="#707">707</a>         <strong class="jxr_keyword">final</strong> Segment&lt;K, V&gt;[] segments = <strong class="jxr_keyword">this</strong>.segments;
<a class="jxr_linenumber" name="708" href="#708">708</a>         <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="709" href="#709">709</a> <em class="jxr_comment">         * We keep track of per-segment modCounts to avoid ABA problems in which</em>
<a class="jxr_linenumber" name="710" href="#710">710</a> <em class="jxr_comment">         * an element in one segment was added and in another removed during</em>
<a class="jxr_linenumber" name="711" href="#711">711</a> <em class="jxr_comment">         * traversal, in which case the table was never actually empty at any</em>
<a class="jxr_linenumber" name="712" href="#712">712</a> <em class="jxr_comment">         * point. Note the similar use of modCounts in the size() and</em>
<a class="jxr_linenumber" name="713" href="#713">713</a> <em class="jxr_comment">         * containsValue() methods, which are the only other methods also</em>
<a class="jxr_linenumber" name="714" href="#714">714</a> <em class="jxr_comment">         * susceptible to ABA problems.</em>
<a class="jxr_linenumber" name="715" href="#715">715</a> <em class="jxr_comment">         */</em>
<a class="jxr_linenumber" name="716" href="#716">716</a>         <strong class="jxr_keyword">int</strong>[] mc = <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">int</strong>[segments.length];
<a class="jxr_linenumber" name="717" href="#717">717</a>         <strong class="jxr_keyword">int</strong> mcsum = 0;
<a class="jxr_linenumber" name="718" href="#718">718</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; segments.length; ++ i) {
<a class="jxr_linenumber" name="719" href="#719">719</a>             <strong class="jxr_keyword">if</strong> (segments[i].count != 0) {
<a class="jxr_linenumber" name="720" href="#720">720</a>                 <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="721" href="#721">721</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="722" href="#722">722</a>                 mcsum += mc[i] = segments[i].modCount;
<a class="jxr_linenumber" name="723" href="#723">723</a>             }
<a class="jxr_linenumber" name="724" href="#724">724</a>         }
<a class="jxr_linenumber" name="725" href="#725">725</a>         <em class="jxr_comment">// If mcsum happens to be zero, then we know we got a snapshot before</em>
<a class="jxr_linenumber" name="726" href="#726">726</a>         <em class="jxr_comment">// any modifications at all were made.  This is probably common enough</em>
<a class="jxr_linenumber" name="727" href="#727">727</a>         <em class="jxr_comment">// to bother tracking.</em>
<a class="jxr_linenumber" name="728" href="#728">728</a>         <strong class="jxr_keyword">if</strong> (mcsum != 0) {
<a class="jxr_linenumber" name="729" href="#729">729</a>             <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; segments.length; ++ i) {
<a class="jxr_linenumber" name="730" href="#730">730</a>                 <strong class="jxr_keyword">if</strong> (segments[i].count != 0 || mc[i] != segments[i].modCount) {
<a class="jxr_linenumber" name="731" href="#731">731</a>                     <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="732" href="#732">732</a>                 }
<a class="jxr_linenumber" name="733" href="#733">733</a>             }
<a class="jxr_linenumber" name="734" href="#734">734</a>         }
<a class="jxr_linenumber" name="735" href="#735">735</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="736" href="#736">736</a>     }
<a class="jxr_linenumber" name="737" href="#737">737</a> 
<a class="jxr_linenumber" name="738" href="#738">738</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="739" href="#739">739</a> <em class="jxr_javadoccomment">     * Returns the number of key-value mappings in this map. If the map contains</em>
<a class="jxr_linenumber" name="740" href="#740">740</a> <em class="jxr_javadoccomment">     * more than &lt;tt&gt;Integer.MAX_VALUE&lt;/tt&gt; elements, returns</em>
<a class="jxr_linenumber" name="741" href="#741">741</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;Integer.MAX_VALUE&lt;/tt&gt;.</em>
<a class="jxr_linenumber" name="742" href="#742">742</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="743" href="#743">743</a> <em class="jxr_javadoccomment">     * @return the number of key-value mappings in this map</em>
<a class="jxr_linenumber" name="744" href="#744">744</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="745" href="#745">745</a>     @Override
<a class="jxr_linenumber" name="746" href="#746">746</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> size() {
<a class="jxr_linenumber" name="747" href="#747">747</a>         <strong class="jxr_keyword">final</strong> Segment&lt;K, V&gt;[] segments = <strong class="jxr_keyword">this</strong>.segments;
<a class="jxr_linenumber" name="748" href="#748">748</a>         <strong class="jxr_keyword">long</strong> sum = 0;
<a class="jxr_linenumber" name="749" href="#749">749</a>         <strong class="jxr_keyword">long</strong> check = 0;
<a class="jxr_linenumber" name="750" href="#750">750</a>         <strong class="jxr_keyword">int</strong>[] mc = <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">int</strong>[segments.length];
<a class="jxr_linenumber" name="751" href="#751">751</a>         <em class="jxr_comment">// Try a few times to get accurate count. On failure due to continuous</em>
<a class="jxr_linenumber" name="752" href="#752">752</a>         <em class="jxr_comment">// async changes in table, resort to locking.</em>
<a class="jxr_linenumber" name="753" href="#753">753</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> k = 0; k &lt; RETRIES_BEFORE_LOCK; ++ k) {
<a class="jxr_linenumber" name="754" href="#754">754</a>             check = 0;
<a class="jxr_linenumber" name="755" href="#755">755</a>             sum = 0;
<a class="jxr_linenumber" name="756" href="#756">756</a>             <strong class="jxr_keyword">int</strong> mcsum = 0;
<a class="jxr_linenumber" name="757" href="#757">757</a>             <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; segments.length; ++ i) {
<a class="jxr_linenumber" name="758" href="#758">758</a>                 sum += segments[i].count;
<a class="jxr_linenumber" name="759" href="#759">759</a>                 mcsum += mc[i] = segments[i].modCount;
<a class="jxr_linenumber" name="760" href="#760">760</a>             }
<a class="jxr_linenumber" name="761" href="#761">761</a>             <strong class="jxr_keyword">if</strong> (mcsum != 0) {
<a class="jxr_linenumber" name="762" href="#762">762</a>                 <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; segments.length; ++ i) {
<a class="jxr_linenumber" name="763" href="#763">763</a>                     check += segments[i].count;
<a class="jxr_linenumber" name="764" href="#764">764</a>                     <strong class="jxr_keyword">if</strong> (mc[i] != segments[i].modCount) {
<a class="jxr_linenumber" name="765" href="#765">765</a>                         check = -1; <em class="jxr_comment">// force retry</em>
<a class="jxr_linenumber" name="766" href="#766">766</a>                         <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="767" href="#767">767</a>                     }
<a class="jxr_linenumber" name="768" href="#768">768</a>                 }
<a class="jxr_linenumber" name="769" href="#769">769</a>             }
<a class="jxr_linenumber" name="770" href="#770">770</a>             <strong class="jxr_keyword">if</strong> (check == sum) {
<a class="jxr_linenumber" name="771" href="#771">771</a>                 <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="772" href="#772">772</a>             }
<a class="jxr_linenumber" name="773" href="#773">773</a>         }
<a class="jxr_linenumber" name="774" href="#774">774</a>         <strong class="jxr_keyword">if</strong> (check != sum) { <em class="jxr_comment">// Resort to locking all segments</em>
<a class="jxr_linenumber" name="775" href="#775">775</a>             sum = 0;
<a class="jxr_linenumber" name="776" href="#776">776</a>             <strong class="jxr_keyword">for</strong> (Segment&lt;K, V&gt; segment: segments) {
<a class="jxr_linenumber" name="777" href="#777">777</a>                 segment.lock();
<a class="jxr_linenumber" name="778" href="#778">778</a>             }
<a class="jxr_linenumber" name="779" href="#779">779</a>             <strong class="jxr_keyword">for</strong> (Segment&lt;K, V&gt; segment: segments) {
<a class="jxr_linenumber" name="780" href="#780">780</a>                 sum += segment.count;
<a class="jxr_linenumber" name="781" href="#781">781</a>             }
<a class="jxr_linenumber" name="782" href="#782">782</a>             <strong class="jxr_keyword">for</strong> (Segment&lt;K, V&gt; segment: segments) {
<a class="jxr_linenumber" name="783" href="#783">783</a>                 segment.unlock();
<a class="jxr_linenumber" name="784" href="#784">784</a>             }
<a class="jxr_linenumber" name="785" href="#785">785</a>         }
<a class="jxr_linenumber" name="786" href="#786">786</a>         <strong class="jxr_keyword">if</strong> (sum &gt; Integer.MAX_VALUE) {
<a class="jxr_linenumber" name="787" href="#787">787</a>             <strong class="jxr_keyword">return</strong> Integer.MAX_VALUE;
<a class="jxr_linenumber" name="788" href="#788">788</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="789" href="#789">789</a>             <strong class="jxr_keyword">return</strong> (<strong class="jxr_keyword">int</strong>) sum;
<a class="jxr_linenumber" name="790" href="#790">790</a>         }
<a class="jxr_linenumber" name="791" href="#791">791</a>     }
<a class="jxr_linenumber" name="792" href="#792">792</a> 
<a class="jxr_linenumber" name="793" href="#793">793</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="794" href="#794">794</a> <em class="jxr_javadoccomment">     * Returns the value to which the specified key is mapped, or {@code null}</em>
<a class="jxr_linenumber" name="795" href="#795">795</a> <em class="jxr_javadoccomment">     * if this map contains no mapping for the key.</em>
<a class="jxr_linenumber" name="796" href="#796">796</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="797" href="#797">797</a> <em class="jxr_javadoccomment">     * &lt;p&gt;More formally, if this map contains a mapping from a key {@code k} to</em>
<a class="jxr_linenumber" name="798" href="#798">798</a> <em class="jxr_javadoccomment">     * a value {@code v} such that {@code key.equals(k)}, then this method</em>
<a class="jxr_linenumber" name="799" href="#799">799</a> <em class="jxr_javadoccomment">     * returns {@code v}; otherwise it returns {@code null}.  (There can be at</em>
<a class="jxr_linenumber" name="800" href="#800">800</a> <em class="jxr_javadoccomment">     * most one such mapping.)</em>
<a class="jxr_linenumber" name="801" href="#801">801</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="802" href="#802">802</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if the specified key is null</em>
<a class="jxr_linenumber" name="803" href="#803">803</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="804" href="#804">804</a>     @Override
<a class="jxr_linenumber" name="805" href="#805">805</a>     <strong class="jxr_keyword">public</strong> V get(Object key) {
<a class="jxr_linenumber" name="806" href="#806">806</a>         <strong class="jxr_keyword">int</strong> hash = hashOf(key);
<a class="jxr_linenumber" name="807" href="#807">807</a>         <strong class="jxr_keyword">return</strong> segmentFor(hash).get(key, hash);
<a class="jxr_linenumber" name="808" href="#808">808</a>     }
<a class="jxr_linenumber" name="809" href="#809">809</a> 
<a class="jxr_linenumber" name="810" href="#810">810</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="811" href="#811">811</a> <em class="jxr_javadoccomment">     * Tests if the specified object is a key in this table.</em>
<a class="jxr_linenumber" name="812" href="#812">812</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="813" href="#813">813</a> <em class="jxr_javadoccomment">     * @param  key   possible key</em>
<a class="jxr_linenumber" name="814" href="#814">814</a> <em class="jxr_javadoccomment">     * @return &lt;tt&gt;true&lt;/tt&gt; if and only if the specified object is a key in</em>
<a class="jxr_linenumber" name="815" href="#815">815</a> <em class="jxr_javadoccomment">     *         this table, as determined by the &lt;tt&gt;equals&lt;/tt&gt; method;</em>
<a class="jxr_linenumber" name="816" href="#816">816</a> <em class="jxr_javadoccomment">     *         &lt;tt&gt;false&lt;/tt&gt; otherwise.</em>
<a class="jxr_linenumber" name="817" href="#817">817</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if the specified key is null</em>
<a class="jxr_linenumber" name="818" href="#818">818</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="819" href="#819">819</a>     @Override
<a class="jxr_linenumber" name="820" href="#820">820</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> containsKey(Object key) {
<a class="jxr_linenumber" name="821" href="#821">821</a>         <strong class="jxr_keyword">int</strong> hash = hashOf(key);
<a class="jxr_linenumber" name="822" href="#822">822</a>         <strong class="jxr_keyword">return</strong> segmentFor(hash).containsKey(key, hash);
<a class="jxr_linenumber" name="823" href="#823">823</a>     }
<a class="jxr_linenumber" name="824" href="#824">824</a> 
<a class="jxr_linenumber" name="825" href="#825">825</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="826" href="#826">826</a> <em class="jxr_javadoccomment">     * Returns &lt;tt&gt;true&lt;/tt&gt; if this map maps one or more keys to the specified</em>
<a class="jxr_linenumber" name="827" href="#827">827</a> <em class="jxr_javadoccomment">     * value. Note: This method requires a full internal traversal of the hash</em>
<a class="jxr_linenumber" name="828" href="#828">828</a> <em class="jxr_javadoccomment">     * table, and so is much slower than method &lt;tt&gt;containsKey&lt;/tt&gt;.</em>
<a class="jxr_linenumber" name="829" href="#829">829</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="830" href="#830">830</a> <em class="jxr_javadoccomment">     * @param value value whose presence in this map is to be tested</em>
<a class="jxr_linenumber" name="831" href="#831">831</a> <em class="jxr_javadoccomment">     * @return &lt;tt&gt;true&lt;/tt&gt; if this map maps one or more keys to the specified</em>
<a class="jxr_linenumber" name="832" href="#832">832</a> <em class="jxr_javadoccomment">     *         value</em>
<a class="jxr_linenumber" name="833" href="#833">833</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if the specified value is null</em>
<a class="jxr_linenumber" name="834" href="#834">834</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="835" href="#835">835</a> 
<a class="jxr_linenumber" name="836" href="#836">836</a>     @Override
<a class="jxr_linenumber" name="837" href="#837">837</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> containsValue(Object value) {
<a class="jxr_linenumber" name="838" href="#838">838</a>         <strong class="jxr_keyword">if</strong> (value == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="839" href="#839">839</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException();
<a class="jxr_linenumber" name="840" href="#840">840</a>         }
<a class="jxr_linenumber" name="841" href="#841">841</a> 
<a class="jxr_linenumber" name="842" href="#842">842</a>         <em class="jxr_comment">// See explanation of modCount use above</em>
<a class="jxr_linenumber" name="843" href="#843">843</a> 
<a class="jxr_linenumber" name="844" href="#844">844</a>         <strong class="jxr_keyword">final</strong> Segment&lt;K, V&gt;[] segments = <strong class="jxr_keyword">this</strong>.segments;
<a class="jxr_linenumber" name="845" href="#845">845</a>         <strong class="jxr_keyword">int</strong>[] mc = <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">int</strong>[segments.length];
<a class="jxr_linenumber" name="846" href="#846">846</a> 
<a class="jxr_linenumber" name="847" href="#847">847</a>         <em class="jxr_comment">// Try a few times without locking</em>
<a class="jxr_linenumber" name="848" href="#848">848</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> k = 0; k &lt; RETRIES_BEFORE_LOCK; ++ k) {
<a class="jxr_linenumber" name="849" href="#849">849</a>             <strong class="jxr_keyword">int</strong> mcsum = 0;
<a class="jxr_linenumber" name="850" href="#850">850</a>             <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; segments.length; ++ i) {
<a class="jxr_linenumber" name="851" href="#851">851</a>                 mcsum += mc[i] = segments[i].modCount;
<a class="jxr_linenumber" name="852" href="#852">852</a>                 <strong class="jxr_keyword">if</strong> (segments[i].containsValue(value)) {
<a class="jxr_linenumber" name="853" href="#853">853</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="854" href="#854">854</a>                 }
<a class="jxr_linenumber" name="855" href="#855">855</a>             }
<a class="jxr_linenumber" name="856" href="#856">856</a>             <strong class="jxr_keyword">boolean</strong> cleanSweep = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="857" href="#857">857</a>             <strong class="jxr_keyword">if</strong> (mcsum != 0) {
<a class="jxr_linenumber" name="858" href="#858">858</a>                 <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; segments.length; ++ i) {
<a class="jxr_linenumber" name="859" href="#859">859</a>                     <strong class="jxr_keyword">if</strong> (mc[i] != segments[i].modCount) {
<a class="jxr_linenumber" name="860" href="#860">860</a>                         cleanSweep = false;
<a class="jxr_linenumber" name="861" href="#861">861</a>                         <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="862" href="#862">862</a>                     }
<a class="jxr_linenumber" name="863" href="#863">863</a>                 }
<a class="jxr_linenumber" name="864" href="#864">864</a>             }
<a class="jxr_linenumber" name="865" href="#865">865</a>             <strong class="jxr_keyword">if</strong> (cleanSweep) {
<a class="jxr_linenumber" name="866" href="#866">866</a>                 <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="867" href="#867">867</a>             }
<a class="jxr_linenumber" name="868" href="#868">868</a>         }
<a class="jxr_linenumber" name="869" href="#869">869</a>         <em class="jxr_comment">// Resort to locking all segments</em>
<a class="jxr_linenumber" name="870" href="#870">870</a>         <strong class="jxr_keyword">for</strong> (Segment&lt;K, V&gt; segment: segments) {
<a class="jxr_linenumber" name="871" href="#871">871</a>             segment.lock();
<a class="jxr_linenumber" name="872" href="#872">872</a>         }
<a class="jxr_linenumber" name="873" href="#873">873</a>         <strong class="jxr_keyword">boolean</strong> found = false;
<a class="jxr_linenumber" name="874" href="#874">874</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="875" href="#875">875</a>             <strong class="jxr_keyword">for</strong> (Segment&lt;K, V&gt; segment: segments) {
<a class="jxr_linenumber" name="876" href="#876">876</a>                 <strong class="jxr_keyword">if</strong> (segment.containsValue(value)) {
<a class="jxr_linenumber" name="877" href="#877">877</a>                     found = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="878" href="#878">878</a>                     <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="879" href="#879">879</a>                 }
<a class="jxr_linenumber" name="880" href="#880">880</a>             }
<a class="jxr_linenumber" name="881" href="#881">881</a>         } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="882" href="#882">882</a>             <strong class="jxr_keyword">for</strong> (Segment&lt;K, V&gt; segment: segments) {
<a class="jxr_linenumber" name="883" href="#883">883</a>                 segment.unlock();
<a class="jxr_linenumber" name="884" href="#884">884</a>             }
<a class="jxr_linenumber" name="885" href="#885">885</a>         }
<a class="jxr_linenumber" name="886" href="#886">886</a>         <strong class="jxr_keyword">return</strong> found;
<a class="jxr_linenumber" name="887" href="#887">887</a>     }
<a class="jxr_linenumber" name="888" href="#888">888</a> 
<a class="jxr_linenumber" name="889" href="#889">889</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="890" href="#890">890</a> <em class="jxr_javadoccomment">     * Legacy method testing if some key maps into the specified value in this</em>
<a class="jxr_linenumber" name="891" href="#891">891</a> <em class="jxr_javadoccomment">     * table.  This method is identical in functionality to</em>
<a class="jxr_linenumber" name="892" href="#892">892</a> <em class="jxr_javadoccomment">     * {@link #containsValue}, and exists solely to ensure full compatibility</em>
<a class="jxr_linenumber" name="893" href="#893">893</a> <em class="jxr_javadoccomment">     * with class {@link Hashtable}, which supported this method prior to</em>
<a class="jxr_linenumber" name="894" href="#894">894</a> <em class="jxr_javadoccomment">     * introduction of the Java Collections framework.</em>
<a class="jxr_linenumber" name="895" href="#895">895</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="896" href="#896">896</a> <em class="jxr_javadoccomment">     * @param  value a value to search for</em>
<a class="jxr_linenumber" name="897" href="#897">897</a> <em class="jxr_javadoccomment">     * @return &lt;tt&gt;true&lt;/tt&gt; if and only if some key maps to the &lt;tt&gt;value&lt;/tt&gt;</em>
<a class="jxr_linenumber" name="898" href="#898">898</a> <em class="jxr_javadoccomment">     *         argument in this table as determined by the &lt;tt&gt;equals&lt;/tt&gt;</em>
<a class="jxr_linenumber" name="899" href="#899">899</a> <em class="jxr_javadoccomment">     *         method; &lt;tt&gt;false&lt;/tt&gt; otherwise</em>
<a class="jxr_linenumber" name="900" href="#900">900</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if the specified value is null</em>
<a class="jxr_linenumber" name="901" href="#901">901</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="902" href="#902">902</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> contains(Object value) {
<a class="jxr_linenumber" name="903" href="#903">903</a>         <strong class="jxr_keyword">return</strong> containsValue(value);
<a class="jxr_linenumber" name="904" href="#904">904</a>     }
<a class="jxr_linenumber" name="905" href="#905">905</a> 
<a class="jxr_linenumber" name="906" href="#906">906</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="907" href="#907">907</a> <em class="jxr_javadoccomment">     * Maps the specified key to the specified value in this table.  Neither the</em>
<a class="jxr_linenumber" name="908" href="#908">908</a> <em class="jxr_javadoccomment">     * key nor the value can be null.</em>
<a class="jxr_linenumber" name="909" href="#909">909</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="910" href="#910">910</a> <em class="jxr_javadoccomment">     * &lt;p&gt;The value can be retrieved by calling the &lt;tt&gt;get&lt;/tt&gt; method with a</em>
<a class="jxr_linenumber" name="911" href="#911">911</a> <em class="jxr_javadoccomment">     * key that is equal to the original key.</em>
<a class="jxr_linenumber" name="912" href="#912">912</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="913" href="#913">913</a> <em class="jxr_javadoccomment">     * @param key key with which the specified value is to be associated</em>
<a class="jxr_linenumber" name="914" href="#914">914</a> <em class="jxr_javadoccomment">     * @param value value to be associated with the specified key</em>
<a class="jxr_linenumber" name="915" href="#915">915</a> <em class="jxr_javadoccomment">     * @return the previous value associated with &lt;tt&gt;key&lt;/tt&gt;, or &lt;tt&gt;null&lt;/tt&gt;</em>
<a class="jxr_linenumber" name="916" href="#916">916</a> <em class="jxr_javadoccomment">     *         if there was no mapping for &lt;tt&gt;key&lt;/tt&gt;</em>
<a class="jxr_linenumber" name="917" href="#917">917</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if the specified key or value is null</em>
<a class="jxr_linenumber" name="918" href="#918">918</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="919" href="#919">919</a>     @Override
<a class="jxr_linenumber" name="920" href="#920">920</a>     <strong class="jxr_keyword">public</strong> V put(K key, V value) {
<a class="jxr_linenumber" name="921" href="#921">921</a>         <strong class="jxr_keyword">if</strong> (value == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="922" href="#922">922</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException();
<a class="jxr_linenumber" name="923" href="#923">923</a>         }
<a class="jxr_linenumber" name="924" href="#924">924</a>         <strong class="jxr_keyword">int</strong> hash = hashOf(key);
<a class="jxr_linenumber" name="925" href="#925">925</a>         <strong class="jxr_keyword">return</strong> segmentFor(hash).put(key, hash, value, false);
<a class="jxr_linenumber" name="926" href="#926">926</a>     }
<a class="jxr_linenumber" name="927" href="#927">927</a> 
<a class="jxr_linenumber" name="928" href="#928">928</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="929" href="#929">929</a> <em class="jxr_javadoccomment">     * @return the previous value associated with the specified key, or</em>
<a class="jxr_linenumber" name="930" href="#930">930</a> <em class="jxr_javadoccomment">     *         &lt;tt&gt;null&lt;/tt&gt; if there was no mapping for the key</em>
<a class="jxr_linenumber" name="931" href="#931">931</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if the specified key or value is null</em>
<a class="jxr_linenumber" name="932" href="#932">932</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="933" href="#933">933</a>     <strong class="jxr_keyword">public</strong> V putIfAbsent(K key, V value) {
<a class="jxr_linenumber" name="934" href="#934">934</a>         <strong class="jxr_keyword">if</strong> (value == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="935" href="#935">935</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException();
<a class="jxr_linenumber" name="936" href="#936">936</a>         }
<a class="jxr_linenumber" name="937" href="#937">937</a>         <strong class="jxr_keyword">int</strong> hash = hashOf(key);
<a class="jxr_linenumber" name="938" href="#938">938</a>         <strong class="jxr_keyword">return</strong> segmentFor(hash).put(key, hash, value, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="939" href="#939">939</a>     }
<a class="jxr_linenumber" name="940" href="#940">940</a> 
<a class="jxr_linenumber" name="941" href="#941">941</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="942" href="#942">942</a> <em class="jxr_javadoccomment">     * Copies all of the mappings from the specified map to this one.  These</em>
<a class="jxr_linenumber" name="943" href="#943">943</a> <em class="jxr_javadoccomment">     * mappings replace any mappings that this map had for any of the keys</em>
<a class="jxr_linenumber" name="944" href="#944">944</a> <em class="jxr_javadoccomment">     * currently in the specified map.</em>
<a class="jxr_linenumber" name="945" href="#945">945</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="946" href="#946">946</a> <em class="jxr_javadoccomment">     * @param m mappings to be stored in this map</em>
<a class="jxr_linenumber" name="947" href="#947">947</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="948" href="#948">948</a>     @Override
<a class="jxr_linenumber" name="949" href="#949">949</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> putAll(Map&lt;? <strong class="jxr_keyword">extends</strong> K, ? <strong class="jxr_keyword">extends</strong> V&gt; m) {
<a class="jxr_linenumber" name="950" href="#950">950</a>         <strong class="jxr_keyword">for</strong> (Map.Entry&lt;? <strong class="jxr_keyword">extends</strong> K, ? <strong class="jxr_keyword">extends</strong> V&gt; e: m.entrySet()) {
<a class="jxr_linenumber" name="951" href="#951">951</a>             put(e.getKey(), e.getValue());
<a class="jxr_linenumber" name="952" href="#952">952</a>         }
<a class="jxr_linenumber" name="953" href="#953">953</a>     }
<a class="jxr_linenumber" name="954" href="#954">954</a> 
<a class="jxr_linenumber" name="955" href="#955">955</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="956" href="#956">956</a> <em class="jxr_javadoccomment">     * Removes the key (and its corresponding value) from this map.  This method</em>
<a class="jxr_linenumber" name="957" href="#957">957</a> <em class="jxr_javadoccomment">     * does nothing if the key is not in the map.</em>
<a class="jxr_linenumber" name="958" href="#958">958</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="959" href="#959">959</a> <em class="jxr_javadoccomment">     * @param  key the key that needs to be removed</em>
<a class="jxr_linenumber" name="960" href="#960">960</a> <em class="jxr_javadoccomment">     * @return the previous value associated with &lt;tt&gt;key&lt;/tt&gt;, or &lt;tt&gt;null&lt;/tt&gt;</em>
<a class="jxr_linenumber" name="961" href="#961">961</a> <em class="jxr_javadoccomment">     *         if there was no mapping for &lt;tt&gt;key&lt;/tt&gt;</em>
<a class="jxr_linenumber" name="962" href="#962">962</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if the specified key is null</em>
<a class="jxr_linenumber" name="963" href="#963">963</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="964" href="#964">964</a>     @Override
<a class="jxr_linenumber" name="965" href="#965">965</a>     <strong class="jxr_keyword">public</strong> V remove(Object key) {
<a class="jxr_linenumber" name="966" href="#966">966</a>         <strong class="jxr_keyword">int</strong> hash = hashOf(key);
<a class="jxr_linenumber" name="967" href="#967">967</a>         <strong class="jxr_keyword">return</strong> segmentFor(hash).remove(key, hash, <strong class="jxr_keyword">null</strong>, false);
<a class="jxr_linenumber" name="968" href="#968">968</a>     }
<a class="jxr_linenumber" name="969" href="#969">969</a> 
<a class="jxr_linenumber" name="970" href="#970">970</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="971" href="#971">971</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if the specified key is null</em>
<a class="jxr_linenumber" name="972" href="#972">972</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="973" href="#973">973</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> remove(Object key, Object value) {
<a class="jxr_linenumber" name="974" href="#974">974</a>         <strong class="jxr_keyword">int</strong> hash = hashOf(key);
<a class="jxr_linenumber" name="975" href="#975">975</a>         <strong class="jxr_keyword">if</strong> (value == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="976" href="#976">976</a>             <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="977" href="#977">977</a>         }
<a class="jxr_linenumber" name="978" href="#978">978</a>         <strong class="jxr_keyword">return</strong> segmentFor(hash).remove(key, hash, value, false) != <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="979" href="#979">979</a>     }
<a class="jxr_linenumber" name="980" href="#980">980</a> 
<a class="jxr_linenumber" name="981" href="#981">981</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="982" href="#982">982</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if any of the arguments are null</em>
<a class="jxr_linenumber" name="983" href="#983">983</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="984" href="#984">984</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> replace(K key, V oldValue, V newValue) {
<a class="jxr_linenumber" name="985" href="#985">985</a>         <strong class="jxr_keyword">if</strong> (oldValue == <strong class="jxr_keyword">null</strong> || newValue == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="986" href="#986">986</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException();
<a class="jxr_linenumber" name="987" href="#987">987</a>         }
<a class="jxr_linenumber" name="988" href="#988">988</a>         <strong class="jxr_keyword">int</strong> hash = hashOf(key);
<a class="jxr_linenumber" name="989" href="#989">989</a>         <strong class="jxr_keyword">return</strong> segmentFor(hash).replace(key, hash, oldValue, newValue);
<a class="jxr_linenumber" name="990" href="#990">990</a>     }
<a class="jxr_linenumber" name="991" href="#991">991</a> 
<a class="jxr_linenumber" name="992" href="#992">992</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="993" href="#993">993</a> <em class="jxr_javadoccomment">     * @return the previous value associated with the specified key, or</em>
<a class="jxr_linenumber" name="994" href="#994">994</a> <em class="jxr_javadoccomment">     *         &lt;tt&gt;null&lt;/tt&gt; if there was no mapping for the key</em>
<a class="jxr_linenumber" name="995" href="#995">995</a> <em class="jxr_javadoccomment">     * @throws NullPointerException if the specified key or value is null</em>
<a class="jxr_linenumber" name="996" href="#996">996</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="997" href="#997">997</a>     <strong class="jxr_keyword">public</strong> V replace(K key, V value) {
<a class="jxr_linenumber" name="998" href="#998">998</a>         <strong class="jxr_keyword">if</strong> (value == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="999" href="#999">999</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException();
<a class="jxr_linenumber" name="1000" href="#1000">1000</a>         }
<a class="jxr_linenumber" name="1001" href="#1001">1001</a>         <strong class="jxr_keyword">int</strong> hash = hashOf(key);
<a class="jxr_linenumber" name="1002" href="#1002">1002</a>         <strong class="jxr_keyword">return</strong> segmentFor(hash).replace(key, hash, value);
<a class="jxr_linenumber" name="1003" href="#1003">1003</a>     }
<a class="jxr_linenumber" name="1004" href="#1004">1004</a> 
<a class="jxr_linenumber" name="1005" href="#1005">1005</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="1006" href="#1006">1006</a> <em class="jxr_javadoccomment">     * Removes all of the mappings from this map.</em>
<a class="jxr_linenumber" name="1007" href="#1007">1007</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="1008" href="#1008">1008</a>     @Override
<a class="jxr_linenumber" name="1009" href="#1009">1009</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> clear() {
<a class="jxr_linenumber" name="1010" href="#1010">1010</a>         <strong class="jxr_keyword">for</strong> (Segment&lt;K, V&gt; segment: segments) {
<a class="jxr_linenumber" name="1011" href="#1011">1011</a>             segment.clear();
<a class="jxr_linenumber" name="1012" href="#1012">1012</a>         }
<a class="jxr_linenumber" name="1013" href="#1013">1013</a>     }
<a class="jxr_linenumber" name="1014" href="#1014">1014</a> 
<a class="jxr_linenumber" name="1015" href="#1015">1015</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="1016" href="#1016">1016</a> <em class="jxr_javadoccomment">     * Returns a {@link Set} view of the keys contained in this map.  The set is</em>
<a class="jxr_linenumber" name="1017" href="#1017">1017</a> <em class="jxr_javadoccomment">     * backed by the map, so changes to the map are reflected in the set, and</em>
<a class="jxr_linenumber" name="1018" href="#1018">1018</a> <em class="jxr_javadoccomment">     * vice-versa.  The set supports element removal, which removes the</em>
<a class="jxr_linenumber" name="1019" href="#1019">1019</a> <em class="jxr_javadoccomment">     * corresponding mapping from this map, via the &lt;tt&gt;Iterator.remove&lt;/tt&gt;,</em>
<a class="jxr_linenumber" name="1020" href="#1020">1020</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;Set.remove&lt;/tt&gt;, &lt;tt&gt;removeAll&lt;/tt&gt;, &lt;tt&gt;retainAll&lt;/tt&gt;, and</em>
<a class="jxr_linenumber" name="1021" href="#1021">1021</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;clear&lt;/tt&gt; operations.  It does not support the &lt;tt&gt;add&lt;/tt&gt; or</em>
<a class="jxr_linenumber" name="1022" href="#1022">1022</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;addAll&lt;/tt&gt; operations.</em>
<a class="jxr_linenumber" name="1023" href="#1023">1023</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="1024" href="#1024">1024</a> <em class="jxr_javadoccomment">     * &lt;p&gt;The view's &lt;tt&gt;iterator&lt;/tt&gt; is a "weakly consistent" iterator that</em>
<a class="jxr_linenumber" name="1025" href="#1025">1025</a> <em class="jxr_javadoccomment">     * will never throw {@link ConcurrentModificationException}, and guarantees</em>
<a class="jxr_linenumber" name="1026" href="#1026">1026</a> <em class="jxr_javadoccomment">     * to traverse elements as they existed upon construction of the iterator,</em>
<a class="jxr_linenumber" name="1027" href="#1027">1027</a> <em class="jxr_javadoccomment">     * and may (but is not guaranteed to) reflect any modifications subsequent</em>
<a class="jxr_linenumber" name="1028" href="#1028">1028</a> <em class="jxr_javadoccomment">     * to construction.</em>
<a class="jxr_linenumber" name="1029" href="#1029">1029</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="1030" href="#1030">1030</a>     @Override
<a class="jxr_linenumber" name="1031" href="#1031">1031</a>     <strong class="jxr_keyword">public</strong> Set&lt;K&gt; keySet() {
<a class="jxr_linenumber" name="1032" href="#1032">1032</a>         Set&lt;K&gt; ks = keySet;
<a class="jxr_linenumber" name="1033" href="#1033">1033</a>         <strong class="jxr_keyword">return</strong> ks != <strong class="jxr_keyword">null</strong>? ks : (keySet = <strong class="jxr_keyword">new</strong> KeySet());
<a class="jxr_linenumber" name="1034" href="#1034">1034</a>     }
<a class="jxr_linenumber" name="1035" href="#1035">1035</a> 
<a class="jxr_linenumber" name="1036" href="#1036">1036</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="1037" href="#1037">1037</a> <em class="jxr_javadoccomment">     * Returns a {@link Collection} view of the values contained in this map.</em>
<a class="jxr_linenumber" name="1038" href="#1038">1038</a> <em class="jxr_javadoccomment">     * The collection is backed by the map, so changes to the map are reflected</em>
<a class="jxr_linenumber" name="1039" href="#1039">1039</a> <em class="jxr_javadoccomment">     * in the collection, and vice-versa.  The collection supports element</em>
<a class="jxr_linenumber" name="1040" href="#1040">1040</a> <em class="jxr_javadoccomment">     * removal, which removes the corresponding mapping from this map, via the</em>
<a class="jxr_linenumber" name="1041" href="#1041">1041</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;Iterator.remove&lt;/tt&gt;, &lt;tt&gt;Collection.remove&lt;/tt&gt;, &lt;tt&gt;removeAll&lt;/tt&gt;,</em>
<a class="jxr_linenumber" name="1042" href="#1042">1042</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;retainAll&lt;/tt&gt;, and &lt;tt&gt;clear&lt;/tt&gt; operations.  It does not support</em>
<a class="jxr_linenumber" name="1043" href="#1043">1043</a> <em class="jxr_javadoccomment">     * the &lt;tt&gt;add&lt;/tt&gt; or &lt;tt&gt;addAll&lt;/tt&gt; operations.</em>
<a class="jxr_linenumber" name="1044" href="#1044">1044</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="1045" href="#1045">1045</a> <em class="jxr_javadoccomment">     * &lt;p&gt;The view's &lt;tt&gt;iterator&lt;/tt&gt; is a "weakly consistent" iterator that</em>
<a class="jxr_linenumber" name="1046" href="#1046">1046</a> <em class="jxr_javadoccomment">     * will never throw {@link ConcurrentModificationException}, and guarantees</em>
<a class="jxr_linenumber" name="1047" href="#1047">1047</a> <em class="jxr_javadoccomment">     * to traverse elements as they existed upon construction of the iterator,</em>
<a class="jxr_linenumber" name="1048" href="#1048">1048</a> <em class="jxr_javadoccomment">     * and may (but is not guaranteed to) reflect any modifications subsequent</em>
<a class="jxr_linenumber" name="1049" href="#1049">1049</a> <em class="jxr_javadoccomment">     * to construction.</em>
<a class="jxr_linenumber" name="1050" href="#1050">1050</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="1051" href="#1051">1051</a>     @Override
<a class="jxr_linenumber" name="1052" href="#1052">1052</a>     <strong class="jxr_keyword">public</strong> Collection&lt;V&gt; values() {
<a class="jxr_linenumber" name="1053" href="#1053">1053</a>         Collection&lt;V&gt; vs = values;
<a class="jxr_linenumber" name="1054" href="#1054">1054</a>         <strong class="jxr_keyword">return</strong> vs != <strong class="jxr_keyword">null</strong>? vs : (values = <strong class="jxr_keyword">new</strong> Values());
<a class="jxr_linenumber" name="1055" href="#1055">1055</a>     }
<a class="jxr_linenumber" name="1056" href="#1056">1056</a> 
<a class="jxr_linenumber" name="1057" href="#1057">1057</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="1058" href="#1058">1058</a> <em class="jxr_javadoccomment">     * Returns a {@link Set} view of the mappings contained in this map.</em>
<a class="jxr_linenumber" name="1059" href="#1059">1059</a> <em class="jxr_javadoccomment">     * The set is backed by the map, so changes to the map are reflected in the</em>
<a class="jxr_linenumber" name="1060" href="#1060">1060</a> <em class="jxr_javadoccomment">     * set, and vice-versa.  The set supports element removal, which removes the</em>
<a class="jxr_linenumber" name="1061" href="#1061">1061</a> <em class="jxr_javadoccomment">     * corresponding mapping from the map, via the &lt;tt&gt;Iterator.remove&lt;/tt&gt;,</em>
<a class="jxr_linenumber" name="1062" href="#1062">1062</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;Set.remove&lt;/tt&gt;, &lt;tt&gt;removeAll&lt;/tt&gt;, &lt;tt&gt;retainAll&lt;/tt&gt;, and</em>
<a class="jxr_linenumber" name="1063" href="#1063">1063</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;clear&lt;/tt&gt; operations.  It does not support the &lt;tt&gt;add&lt;/tt&gt; or</em>
<a class="jxr_linenumber" name="1064" href="#1064">1064</a> <em class="jxr_javadoccomment">     * &lt;tt&gt;addAll&lt;/tt&gt; operations.</em>
<a class="jxr_linenumber" name="1065" href="#1065">1065</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="1066" href="#1066">1066</a> <em class="jxr_javadoccomment">     * &lt;p&gt;The view's &lt;tt&gt;iterator&lt;/tt&gt; is a "weakly consistent" iterator that</em>
<a class="jxr_linenumber" name="1067" href="#1067">1067</a> <em class="jxr_javadoccomment">     * will never throw {@link ConcurrentModificationException}, and guarantees</em>
<a class="jxr_linenumber" name="1068" href="#1068">1068</a> <em class="jxr_javadoccomment">     * to traverse elements as they existed upon construction of the iterator,</em>
<a class="jxr_linenumber" name="1069" href="#1069">1069</a> <em class="jxr_javadoccomment">     * and may (but is not guaranteed to) reflect any modifications subsequent</em>
<a class="jxr_linenumber" name="1070" href="#1070">1070</a> <em class="jxr_javadoccomment">     * to construction.</em>
<a class="jxr_linenumber" name="1071" href="#1071">1071</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="1072" href="#1072">1072</a>     @Override
<a class="jxr_linenumber" name="1073" href="#1073">1073</a>     <strong class="jxr_keyword">public</strong> Set&lt;Map.Entry&lt;K, V&gt;&gt; entrySet() {
<a class="jxr_linenumber" name="1074" href="#1074">1074</a>         Set&lt;Map.Entry&lt;K, V&gt;&gt; es = entrySet;
<a class="jxr_linenumber" name="1075" href="#1075">1075</a>         <strong class="jxr_keyword">return</strong> es != <strong class="jxr_keyword">null</strong>? es : (entrySet = <strong class="jxr_keyword">new</strong> EntrySet());
<a class="jxr_linenumber" name="1076" href="#1076">1076</a>     }
<a class="jxr_linenumber" name="1077" href="#1077">1077</a> 
<a class="jxr_linenumber" name="1078" href="#1078">1078</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="1079" href="#1079">1079</a> <em class="jxr_javadoccomment">     * Returns an enumeration of the keys in this table.</em>
<a class="jxr_linenumber" name="1080" href="#1080">1080</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="1081" href="#1081">1081</a> <em class="jxr_javadoccomment">     * @return an enumeration of the keys in this table</em>
<a class="jxr_linenumber" name="1082" href="#1082">1082</a> <em class="jxr_javadoccomment">     * @see #keySet()</em>
<a class="jxr_linenumber" name="1083" href="#1083">1083</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="1084" href="#1084">1084</a>     <strong class="jxr_keyword">public</strong> Enumeration&lt;K&gt; keys() {
<a class="jxr_linenumber" name="1085" href="#1085">1085</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">KeyIterator</a>();
<a class="jxr_linenumber" name="1086" href="#1086">1086</a>     }
<a class="jxr_linenumber" name="1087" href="#1087">1087</a> 
<a class="jxr_linenumber" name="1088" href="#1088">1088</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="1089" href="#1089">1089</a> <em class="jxr_javadoccomment">     * Returns an enumeration of the values in this table.</em>
<a class="jxr_linenumber" name="1090" href="#1090">1090</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="1091" href="#1091">1091</a> <em class="jxr_javadoccomment">     * @return an enumeration of the values in this table</em>
<a class="jxr_linenumber" name="1092" href="#1092">1092</a> <em class="jxr_javadoccomment">     * @see #values()</em>
<a class="jxr_linenumber" name="1093" href="#1093">1093</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="1094" href="#1094">1094</a>     <strong class="jxr_keyword">public</strong> Enumeration&lt;V&gt; elements() {
<a class="jxr_linenumber" name="1095" href="#1095">1095</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">ValueIterator</a>();
<a class="jxr_linenumber" name="1096" href="#1096">1096</a>     }
<a class="jxr_linenumber" name="1097" href="#1097">1097</a> 
<a class="jxr_linenumber" name="1098" href="#1098">1098</a>     <em class="jxr_comment">/*<em class="jxr_comment"> ---------------- Iterator Support -------------- */</em></em>
<a class="jxr_linenumber" name="1099" href="#1099">1099</a> 
<a class="jxr_linenumber" name="1100" href="#1100">1100</a>     <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">HashIterator</a> {
<a class="jxr_linenumber" name="1101" href="#1101">1101</a>         <strong class="jxr_keyword">int</strong> nextSegmentIndex;
<a class="jxr_linenumber" name="1102" href="#1102">1102</a>         <strong class="jxr_keyword">int</strong> nextTableIndex;
<a class="jxr_linenumber" name="1103" href="#1103">1103</a>         HashEntry&lt;K, V&gt;[] currentTable;
<a class="jxr_linenumber" name="1104" href="#1104">1104</a>         HashEntry&lt;K, V&gt; nextEntry;
<a class="jxr_linenumber" name="1105" href="#1105">1105</a>         HashEntry&lt;K, V&gt; lastReturned;
<a class="jxr_linenumber" name="1106" href="#1106">1106</a>         K currentKey; <em class="jxr_comment">// Strong reference to weak key (prevents gc)</em>
<a class="jxr_linenumber" name="1107" href="#1107">1107</a> 
<a class="jxr_linenumber" name="1108" href="#1108">1108</a>         <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">HashIterator</a>() {
<a class="jxr_linenumber" name="1109" href="#1109">1109</a>             nextSegmentIndex = segments.length - 1;
<a class="jxr_linenumber" name="1110" href="#1110">1110</a>             nextTableIndex = -1;
<a class="jxr_linenumber" name="1111" href="#1111">1111</a>             advance();
<a class="jxr_linenumber" name="1112" href="#1112">1112</a>         }
<a class="jxr_linenumber" name="1113" href="#1113">1113</a> 
<a class="jxr_linenumber" name="1114" href="#1114">1114</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> rewind() {
<a class="jxr_linenumber" name="1115" href="#1115">1115</a>             nextSegmentIndex = segments.length - 1;
<a class="jxr_linenumber" name="1116" href="#1116">1116</a>             nextTableIndex = -1;
<a class="jxr_linenumber" name="1117" href="#1117">1117</a>             currentTable = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="1118" href="#1118">1118</a>             nextEntry = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="1119" href="#1119">1119</a>             lastReturned = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="1120" href="#1120">1120</a>             currentKey = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="1121" href="#1121">1121</a>             advance();
<a class="jxr_linenumber" name="1122" href="#1122">1122</a>         }
<a class="jxr_linenumber" name="1123" href="#1123">1123</a> 
<a class="jxr_linenumber" name="1124" href="#1124">1124</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> hasMoreElements() {
<a class="jxr_linenumber" name="1125" href="#1125">1125</a>             <strong class="jxr_keyword">return</strong> hasNext();
<a class="jxr_linenumber" name="1126" href="#1126">1126</a>         }
<a class="jxr_linenumber" name="1127" href="#1127">1127</a> 
<a class="jxr_linenumber" name="1128" href="#1128">1128</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">void</strong> advance() {
<a class="jxr_linenumber" name="1129" href="#1129">1129</a>             <strong class="jxr_keyword">if</strong> (nextEntry != <strong class="jxr_keyword">null</strong> &amp;&amp; (nextEntry = nextEntry.next) != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="1130" href="#1130">1130</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="1131" href="#1131">1131</a>             }
<a class="jxr_linenumber" name="1132" href="#1132">1132</a> 
<a class="jxr_linenumber" name="1133" href="#1133">1133</a>             <strong class="jxr_keyword">while</strong> (nextTableIndex &gt;= 0) {
<a class="jxr_linenumber" name="1134" href="#1134">1134</a>                 <strong class="jxr_keyword">if</strong> ((nextEntry = currentTable[nextTableIndex --]) != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="1135" href="#1135">1135</a>                     <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="1136" href="#1136">1136</a>                 }
<a class="jxr_linenumber" name="1137" href="#1137">1137</a>             }
<a class="jxr_linenumber" name="1138" href="#1138">1138</a> 
<a class="jxr_linenumber" name="1139" href="#1139">1139</a>             <strong class="jxr_keyword">while</strong> (nextSegmentIndex &gt;= 0) {
<a class="jxr_linenumber" name="1140" href="#1140">1140</a>                 Segment&lt;K, V&gt; seg = segments[nextSegmentIndex --];
<a class="jxr_linenumber" name="1141" href="#1141">1141</a>                 <strong class="jxr_keyword">if</strong> (seg.count != 0) {
<a class="jxr_linenumber" name="1142" href="#1142">1142</a>                     currentTable = seg.table;
<a class="jxr_linenumber" name="1143" href="#1143">1143</a>                     <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> j = currentTable.length - 1; j &gt;= 0; -- j) {
<a class="jxr_linenumber" name="1144" href="#1144">1144</a>                         <strong class="jxr_keyword">if</strong> ((nextEntry = currentTable[j]) != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="1145" href="#1145">1145</a>                             nextTableIndex = j - 1;
<a class="jxr_linenumber" name="1146" href="#1146">1146</a>                             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="1147" href="#1147">1147</a>                         }
<a class="jxr_linenumber" name="1148" href="#1148">1148</a>                     }
<a class="jxr_linenumber" name="1149" href="#1149">1149</a>                 }
<a class="jxr_linenumber" name="1150" href="#1150">1150</a>             }
<a class="jxr_linenumber" name="1151" href="#1151">1151</a>         }
<a class="jxr_linenumber" name="1152" href="#1152">1152</a> 
<a class="jxr_linenumber" name="1153" href="#1153">1153</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> hasNext() {
<a class="jxr_linenumber" name="1154" href="#1154">1154</a>             <strong class="jxr_keyword">while</strong> (nextEntry != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="1155" href="#1155">1155</a>                 <strong class="jxr_keyword">if</strong> (nextEntry.key() != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="1156" href="#1156">1156</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="1157" href="#1157">1157</a>                 }
<a class="jxr_linenumber" name="1158" href="#1158">1158</a>                 advance();
<a class="jxr_linenumber" name="1159" href="#1159">1159</a>             }
<a class="jxr_linenumber" name="1160" href="#1160">1160</a> 
<a class="jxr_linenumber" name="1161" href="#1161">1161</a>             <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="1162" href="#1162">1162</a>         }
<a class="jxr_linenumber" name="1163" href="#1163">1163</a> 
<a class="jxr_linenumber" name="1164" href="#1164">1164</a>         HashEntry&lt;K, V&gt; nextEntry() {
<a class="jxr_linenumber" name="1165" href="#1165">1165</a>             <strong class="jxr_keyword">do</strong> {
<a class="jxr_linenumber" name="1166" href="#1166">1166</a>                 <strong class="jxr_keyword">if</strong> (nextEntry == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="1167" href="#1167">1167</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NoSuchElementException();
<a class="jxr_linenumber" name="1168" href="#1168">1168</a>                 }
<a class="jxr_linenumber" name="1169" href="#1169">1169</a> 
<a class="jxr_linenumber" name="1170" href="#1170">1170</a>                 lastReturned = nextEntry;
<a class="jxr_linenumber" name="1171" href="#1171">1171</a>                 currentKey = lastReturned.key();
<a class="jxr_linenumber" name="1172" href="#1172">1172</a>                 advance();
<a class="jxr_linenumber" name="1173" href="#1173">1173</a>             } <strong class="jxr_keyword">while</strong> (currentKey == <strong class="jxr_keyword">null</strong>); <em class="jxr_comment">// Skip GC'd keys</em>
<a class="jxr_linenumber" name="1174" href="#1174">1174</a> 
<a class="jxr_linenumber" name="1175" href="#1175">1175</a>             <strong class="jxr_keyword">return</strong> lastReturned;
<a class="jxr_linenumber" name="1176" href="#1176">1176</a>         }
<a class="jxr_linenumber" name="1177" href="#1177">1177</a> 
<a class="jxr_linenumber" name="1178" href="#1178">1178</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> remove() {
<a class="jxr_linenumber" name="1179" href="#1179">1179</a>             <strong class="jxr_keyword">if</strong> (lastReturned == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="1180" href="#1180">1180</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalStateException();
<a class="jxr_linenumber" name="1181" href="#1181">1181</a>             }
<a class="jxr_linenumber" name="1182" href="#1182">1182</a>             ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.remove(currentKey);
<a class="jxr_linenumber" name="1183" href="#1183">1183</a>             lastReturned = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="1184" href="#1184">1184</a>         }
<a class="jxr_linenumber" name="1185" href="#1185">1185</a>     }
<a class="jxr_linenumber" name="1186" href="#1186">1186</a> 
<a class="jxr_linenumber" name="1187" href="#1187">1187</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">KeyIterator</a>
<a class="jxr_linenumber" name="1188" href="#1188">1188</a>             <strong class="jxr_keyword">extends</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">HashIterator</a> <strong class="jxr_keyword">implements</strong> ReusableIterator&lt;K&gt;, Enumeration&lt;K&gt; {
<a class="jxr_linenumber" name="1189" href="#1189">1189</a> 
<a class="jxr_linenumber" name="1190" href="#1190">1190</a>         <strong class="jxr_keyword">public</strong> K next() {
<a class="jxr_linenumber" name="1191" href="#1191">1191</a>             <strong class="jxr_keyword">return</strong> nextEntry().key();
<a class="jxr_linenumber" name="1192" href="#1192">1192</a>         }
<a class="jxr_linenumber" name="1193" href="#1193">1193</a> 
<a class="jxr_linenumber" name="1194" href="#1194">1194</a>         <strong class="jxr_keyword">public</strong> K nextElement() {
<a class="jxr_linenumber" name="1195" href="#1195">1195</a>             <strong class="jxr_keyword">return</strong> nextEntry().key();
<a class="jxr_linenumber" name="1196" href="#1196">1196</a>         }
<a class="jxr_linenumber" name="1197" href="#1197">1197</a>     }
<a class="jxr_linenumber" name="1198" href="#1198">1198</a> 
<a class="jxr_linenumber" name="1199" href="#1199">1199</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">ValueIterator</a>
<a class="jxr_linenumber" name="1200" href="#1200">1200</a>             <strong class="jxr_keyword">extends</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">HashIterator</a> <strong class="jxr_keyword">implements</strong> ReusableIterator&lt;V&gt;, Enumeration&lt;V&gt; {
<a class="jxr_linenumber" name="1201" href="#1201">1201</a> 
<a class="jxr_linenumber" name="1202" href="#1202">1202</a>         <strong class="jxr_keyword">public</strong> V next() {
<a class="jxr_linenumber" name="1203" href="#1203">1203</a>             <strong class="jxr_keyword">return</strong> nextEntry().value();
<a class="jxr_linenumber" name="1204" href="#1204">1204</a>         }
<a class="jxr_linenumber" name="1205" href="#1205">1205</a> 
<a class="jxr_linenumber" name="1206" href="#1206">1206</a>         <strong class="jxr_keyword">public</strong> V nextElement() {
<a class="jxr_linenumber" name="1207" href="#1207">1207</a>             <strong class="jxr_keyword">return</strong> nextEntry().value();
<a class="jxr_linenumber" name="1208" href="#1208">1208</a>         }
<a class="jxr_linenumber" name="1209" href="#1209">1209</a>     }
<a class="jxr_linenumber" name="1210" href="#1210">1210</a> 
<a class="jxr_linenumber" name="1211" href="#1211">1211</a>     <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="1212" href="#1212">1212</a> <em class="jxr_comment">     * This class is needed for JDK5 compatibility.</em>
<a class="jxr_linenumber" name="1213" href="#1213">1213</a> <em class="jxr_comment">     */</em>
<a class="jxr_linenumber" name="1214" href="#1214">1214</a>     <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> SimpleEntry&lt;K, V&gt; <strong class="jxr_keyword">implements</strong> Entry&lt;K, V&gt; {
<a class="jxr_linenumber" name="1215" href="#1215">1215</a> 
<a class="jxr_linenumber" name="1216" href="#1216">1216</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> K key;
<a class="jxr_linenumber" name="1217" href="#1217">1217</a> 
<a class="jxr_linenumber" name="1218" href="#1218">1218</a>         <strong class="jxr_keyword">private</strong> V value;
<a class="jxr_linenumber" name="1219" href="#1219">1219</a> 
<a class="jxr_linenumber" name="1220" href="#1220">1220</a>         <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">SimpleEntry</a>(K key, V value) {
<a class="jxr_linenumber" name="1221" href="#1221">1221</a>             <strong class="jxr_keyword">this</strong>.key = key;
<a class="jxr_linenumber" name="1222" href="#1222">1222</a>             <strong class="jxr_keyword">this</strong>.value = value;
<a class="jxr_linenumber" name="1223" href="#1223">1223</a>         }
<a class="jxr_linenumber" name="1224" href="#1224">1224</a> 
<a class="jxr_linenumber" name="1225" href="#1225">1225</a>         <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">SimpleEntry</a>(Entry&lt;? <strong class="jxr_keyword">extends</strong> K, ? <strong class="jxr_keyword">extends</strong> V&gt; entry) {
<a class="jxr_linenumber" name="1226" href="#1226">1226</a>             key = entry.getKey();
<a class="jxr_linenumber" name="1227" href="#1227">1227</a>             value = entry.getValue();
<a class="jxr_linenumber" name="1228" href="#1228">1228</a>         }
<a class="jxr_linenumber" name="1229" href="#1229">1229</a> 
<a class="jxr_linenumber" name="1230" href="#1230">1230</a>         <strong class="jxr_keyword">public</strong> K getKey() {
<a class="jxr_linenumber" name="1231" href="#1231">1231</a>             <strong class="jxr_keyword">return</strong> key;
<a class="jxr_linenumber" name="1232" href="#1232">1232</a>         }
<a class="jxr_linenumber" name="1233" href="#1233">1233</a> 
<a class="jxr_linenumber" name="1234" href="#1234">1234</a>         <strong class="jxr_keyword">public</strong> V getValue() {
<a class="jxr_linenumber" name="1235" href="#1235">1235</a>             <strong class="jxr_keyword">return</strong> value;
<a class="jxr_linenumber" name="1236" href="#1236">1236</a>         }
<a class="jxr_linenumber" name="1237" href="#1237">1237</a> 
<a class="jxr_linenumber" name="1238" href="#1238">1238</a>         <strong class="jxr_keyword">public</strong> V setValue(V value) {
<a class="jxr_linenumber" name="1239" href="#1239">1239</a>             V oldValue = <strong class="jxr_keyword">this</strong>.value;
<a class="jxr_linenumber" name="1240" href="#1240">1240</a>             <strong class="jxr_keyword">this</strong>.value = value;
<a class="jxr_linenumber" name="1241" href="#1241">1241</a>             <strong class="jxr_keyword">return</strong> oldValue;
<a class="jxr_linenumber" name="1242" href="#1242">1242</a>         }
<a class="jxr_linenumber" name="1243" href="#1243">1243</a> 
<a class="jxr_linenumber" name="1244" href="#1244">1244</a>         @Override
<a class="jxr_linenumber" name="1245" href="#1245">1245</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> equals(Object o) {
<a class="jxr_linenumber" name="1246" href="#1246">1246</a>             <strong class="jxr_keyword">if</strong> (!(o instanceof Map.Entry&lt;?, ?&gt;)) {
<a class="jxr_linenumber" name="1247" href="#1247">1247</a>                 <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="1248" href="#1248">1248</a>             }
<a class="jxr_linenumber" name="1249" href="#1249">1249</a>             @SuppressWarnings(<span class="jxr_string">"rawtypes"</span>)
<a class="jxr_linenumber" name="1250" href="#1250">1250</a>             Map.Entry e = (Map.Entry) o;
<a class="jxr_linenumber" name="1251" href="#1251">1251</a>             <strong class="jxr_keyword">return</strong> eq(key, e.getKey()) &amp;&amp; eq(value, e.getValue());
<a class="jxr_linenumber" name="1252" href="#1252">1252</a>         }
<a class="jxr_linenumber" name="1253" href="#1253">1253</a> 
<a class="jxr_linenumber" name="1254" href="#1254">1254</a>         @Override
<a class="jxr_linenumber" name="1255" href="#1255">1255</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> hashCode() {
<a class="jxr_linenumber" name="1256" href="#1256">1256</a>             <strong class="jxr_keyword">return</strong> (key == <strong class="jxr_keyword">null</strong>? 0 : key.hashCode()) ^ (value == <strong class="jxr_keyword">null</strong>? 0 : value.hashCode());
<a class="jxr_linenumber" name="1257" href="#1257">1257</a>         }
<a class="jxr_linenumber" name="1258" href="#1258">1258</a> 
<a class="jxr_linenumber" name="1259" href="#1259">1259</a>         @Override
<a class="jxr_linenumber" name="1260" href="#1260">1260</a>         <strong class="jxr_keyword">public</strong> String toString() {
<a class="jxr_linenumber" name="1261" href="#1261">1261</a>             <strong class="jxr_keyword">return</strong> key + <span class="jxr_string">"="</span> + value;
<a class="jxr_linenumber" name="1262" href="#1262">1262</a>         }
<a class="jxr_linenumber" name="1263" href="#1263">1263</a> 
<a class="jxr_linenumber" name="1264" href="#1264">1264</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> eq(Object o1, Object o2) {
<a class="jxr_linenumber" name="1265" href="#1265">1265</a>             <strong class="jxr_keyword">return</strong> o1 == <strong class="jxr_keyword">null</strong>? o2 == <strong class="jxr_keyword">null</strong> : o1.equals(o2);
<a class="jxr_linenumber" name="1266" href="#1266">1266</a>         }
<a class="jxr_linenumber" name="1267" href="#1267">1267</a>     }
<a class="jxr_linenumber" name="1268" href="#1268">1268</a> 
<a class="jxr_linenumber" name="1269" href="#1269">1269</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="1270" href="#1270">1270</a> <em class="jxr_javadoccomment">     * Custom Entry class used by EntryIterator.next(), that relays setValue</em>
<a class="jxr_linenumber" name="1271" href="#1271">1271</a> <em class="jxr_javadoccomment">     * changes to the underlying map.</em>
<a class="jxr_linenumber" name="1272" href="#1272">1272</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="1273" href="#1273">1273</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">WriteThroughEntry</a> <strong class="jxr_keyword">extends</strong> SimpleEntry&lt;K, V&gt; {
<a class="jxr_linenumber" name="1274" href="#1274">1274</a> 
<a class="jxr_linenumber" name="1275" href="#1275">1275</a>         <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">WriteThroughEntry</a>(K k, V v) {
<a class="jxr_linenumber" name="1276" href="#1276">1276</a>             <strong class="jxr_keyword">super</strong>(k, v);
<a class="jxr_linenumber" name="1277" href="#1277">1277</a>         }
<a class="jxr_linenumber" name="1278" href="#1278">1278</a> 
<a class="jxr_linenumber" name="1279" href="#1279">1279</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="1280" href="#1280">1280</a> <em class="jxr_javadoccomment">         * Set our entry's value and write through to the map. The value to</em>
<a class="jxr_linenumber" name="1281" href="#1281">1281</a> <em class="jxr_javadoccomment">         * return is somewhat arbitrary here. Since a WriteThroughEntry does not</em>
<a class="jxr_linenumber" name="1282" href="#1282">1282</a> <em class="jxr_javadoccomment">         * necessarily track asynchronous changes, the most recent "previous"</em>
<a class="jxr_linenumber" name="1283" href="#1283">1283</a> <em class="jxr_javadoccomment">         * value could be different from what we return (or could even have been</em>
<a class="jxr_linenumber" name="1284" href="#1284">1284</a> <em class="jxr_javadoccomment">         * removed in which case the put will re-establish). We do not and can</em>
<a class="jxr_linenumber" name="1285" href="#1285">1285</a> <em class="jxr_javadoccomment">         * not guarantee more.</em>
<a class="jxr_linenumber" name="1286" href="#1286">1286</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="1287" href="#1287">1287</a>         @Override
<a class="jxr_linenumber" name="1288" href="#1288">1288</a>         <strong class="jxr_keyword">public</strong> V setValue(V value) {
<a class="jxr_linenumber" name="1289" href="#1289">1289</a> 
<a class="jxr_linenumber" name="1290" href="#1290">1290</a>             <strong class="jxr_keyword">if</strong> (value == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="1291" href="#1291">1291</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException();
<a class="jxr_linenumber" name="1292" href="#1292">1292</a>             }
<a class="jxr_linenumber" name="1293" href="#1293">1293</a>             V v = <strong class="jxr_keyword">super</strong>.setValue(value);
<a class="jxr_linenumber" name="1294" href="#1294">1294</a>             put(getKey(), value);
<a class="jxr_linenumber" name="1295" href="#1295">1295</a>             <strong class="jxr_keyword">return</strong> v;
<a class="jxr_linenumber" name="1296" href="#1296">1296</a>         }
<a class="jxr_linenumber" name="1297" href="#1297">1297</a>     }
<a class="jxr_linenumber" name="1298" href="#1298">1298</a> 
<a class="jxr_linenumber" name="1299" href="#1299">1299</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">EntryIterator</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">HashIterator</a> <strong class="jxr_keyword">implements</strong>
<a class="jxr_linenumber" name="1300" href="#1300">1300</a>             ReusableIterator&lt;Entry&lt;K, V&gt;&gt; {
<a class="jxr_linenumber" name="1301" href="#1301">1301</a>         <strong class="jxr_keyword">public</strong> Map.Entry&lt;K, V&gt; next() {
<a class="jxr_linenumber" name="1302" href="#1302">1302</a>             HashEntry&lt;K, V&gt; e = nextEntry();
<a class="jxr_linenumber" name="1303" href="#1303">1303</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">WriteThroughEntry</a>(e.key(), e.value());
<a class="jxr_linenumber" name="1304" href="#1304">1304</a>         }
<a class="jxr_linenumber" name="1305" href="#1305">1305</a>     }
<a class="jxr_linenumber" name="1306" href="#1306">1306</a> 
<a class="jxr_linenumber" name="1307" href="#1307">1307</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">KeySet</a> <strong class="jxr_keyword">extends</strong> AbstractSet&lt;K&gt; {
<a class="jxr_linenumber" name="1308" href="#1308">1308</a>         @Override
<a class="jxr_linenumber" name="1309" href="#1309">1309</a>         <strong class="jxr_keyword">public</strong> Iterator&lt;K&gt; iterator() {
<a class="jxr_linenumber" name="1310" href="#1310">1310</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">KeyIterator</a>();
<a class="jxr_linenumber" name="1311" href="#1311">1311</a>         }
<a class="jxr_linenumber" name="1312" href="#1312">1312</a> 
<a class="jxr_linenumber" name="1313" href="#1313">1313</a>         @Override
<a class="jxr_linenumber" name="1314" href="#1314">1314</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> size() {
<a class="jxr_linenumber" name="1315" href="#1315">1315</a>             <strong class="jxr_keyword">return</strong> ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.size();
<a class="jxr_linenumber" name="1316" href="#1316">1316</a>         }
<a class="jxr_linenumber" name="1317" href="#1317">1317</a> 
<a class="jxr_linenumber" name="1318" href="#1318">1318</a>         @Override
<a class="jxr_linenumber" name="1319" href="#1319">1319</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isEmpty() {
<a class="jxr_linenumber" name="1320" href="#1320">1320</a>             <strong class="jxr_keyword">return</strong> ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.isEmpty();
<a class="jxr_linenumber" name="1321" href="#1321">1321</a>         }
<a class="jxr_linenumber" name="1322" href="#1322">1322</a> 
<a class="jxr_linenumber" name="1323" href="#1323">1323</a>         @Override
<a class="jxr_linenumber" name="1324" href="#1324">1324</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> contains(Object o) {
<a class="jxr_linenumber" name="1325" href="#1325">1325</a>             <strong class="jxr_keyword">return</strong> containsKey(o);
<a class="jxr_linenumber" name="1326" href="#1326">1326</a>         }
<a class="jxr_linenumber" name="1327" href="#1327">1327</a> 
<a class="jxr_linenumber" name="1328" href="#1328">1328</a>         @Override
<a class="jxr_linenumber" name="1329" href="#1329">1329</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> remove(Object o) {
<a class="jxr_linenumber" name="1330" href="#1330">1330</a>             <strong class="jxr_keyword">return</strong> ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.remove(o) != <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="1331" href="#1331">1331</a>         }
<a class="jxr_linenumber" name="1332" href="#1332">1332</a> 
<a class="jxr_linenumber" name="1333" href="#1333">1333</a>         @Override
<a class="jxr_linenumber" name="1334" href="#1334">1334</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> clear() {
<a class="jxr_linenumber" name="1335" href="#1335">1335</a>             ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.clear();
<a class="jxr_linenumber" name="1336" href="#1336">1336</a>         }
<a class="jxr_linenumber" name="1337" href="#1337">1337</a>     }
<a class="jxr_linenumber" name="1338" href="#1338">1338</a> 
<a class="jxr_linenumber" name="1339" href="#1339">1339</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">Values</a> <strong class="jxr_keyword">extends</strong> AbstractCollection&lt;V&gt; {
<a class="jxr_linenumber" name="1340" href="#1340">1340</a>         @Override
<a class="jxr_linenumber" name="1341" href="#1341">1341</a>         <strong class="jxr_keyword">public</strong> Iterator&lt;V&gt; iterator() {
<a class="jxr_linenumber" name="1342" href="#1342">1342</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">ValueIterator</a>();
<a class="jxr_linenumber" name="1343" href="#1343">1343</a>         }
<a class="jxr_linenumber" name="1344" href="#1344">1344</a> 
<a class="jxr_linenumber" name="1345" href="#1345">1345</a>         @Override
<a class="jxr_linenumber" name="1346" href="#1346">1346</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> size() {
<a class="jxr_linenumber" name="1347" href="#1347">1347</a>             <strong class="jxr_keyword">return</strong> ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.size();
<a class="jxr_linenumber" name="1348" href="#1348">1348</a>         }
<a class="jxr_linenumber" name="1349" href="#1349">1349</a> 
<a class="jxr_linenumber" name="1350" href="#1350">1350</a>         @Override
<a class="jxr_linenumber" name="1351" href="#1351">1351</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isEmpty() {
<a class="jxr_linenumber" name="1352" href="#1352">1352</a>             <strong class="jxr_keyword">return</strong> ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.isEmpty();
<a class="jxr_linenumber" name="1353" href="#1353">1353</a>         }
<a class="jxr_linenumber" name="1354" href="#1354">1354</a> 
<a class="jxr_linenumber" name="1355" href="#1355">1355</a>         @Override
<a class="jxr_linenumber" name="1356" href="#1356">1356</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> contains(Object o) {
<a class="jxr_linenumber" name="1357" href="#1357">1357</a>             <strong class="jxr_keyword">return</strong> containsValue(o);
<a class="jxr_linenumber" name="1358" href="#1358">1358</a>         }
<a class="jxr_linenumber" name="1359" href="#1359">1359</a> 
<a class="jxr_linenumber" name="1360" href="#1360">1360</a>         @Override
<a class="jxr_linenumber" name="1361" href="#1361">1361</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> clear() {
<a class="jxr_linenumber" name="1362" href="#1362">1362</a>             ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.clear();
<a class="jxr_linenumber" name="1363" href="#1363">1363</a>         }
<a class="jxr_linenumber" name="1364" href="#1364">1364</a>     }
<a class="jxr_linenumber" name="1365" href="#1365">1365</a> 
<a class="jxr_linenumber" name="1366" href="#1366">1366</a>     <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">EntrySet</a> <strong class="jxr_keyword">extends</strong> AbstractSet&lt;Map.Entry&lt;K, V&gt;&gt; {
<a class="jxr_linenumber" name="1367" href="#1367">1367</a>         @Override
<a class="jxr_linenumber" name="1368" href="#1368">1368</a>         <strong class="jxr_keyword">public</strong> Iterator&lt;Map.Entry&lt;K, V&gt;&gt; iterator() {
<a class="jxr_linenumber" name="1369" href="#1369">1369</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/util/internal/ConcurrentIdentityWeakKeyHashMap.html">EntryIterator</a>();
<a class="jxr_linenumber" name="1370" href="#1370">1370</a>         }
<a class="jxr_linenumber" name="1371" href="#1371">1371</a> 
<a class="jxr_linenumber" name="1372" href="#1372">1372</a>         @Override
<a class="jxr_linenumber" name="1373" href="#1373">1373</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> contains(Object o) {
<a class="jxr_linenumber" name="1374" href="#1374">1374</a>             <strong class="jxr_keyword">if</strong> (!(o instanceof Map.Entry&lt;?, ?&gt;)) {
<a class="jxr_linenumber" name="1375" href="#1375">1375</a>                 <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="1376" href="#1376">1376</a>             }
<a class="jxr_linenumber" name="1377" href="#1377">1377</a>             Map.Entry&lt;?, ?&gt; e = (Map.Entry&lt;?, ?&gt;) o;
<a class="jxr_linenumber" name="1378" href="#1378">1378</a>             V v = get(e.getKey());
<a class="jxr_linenumber" name="1379" href="#1379">1379</a>             <strong class="jxr_keyword">return</strong> v != <strong class="jxr_keyword">null</strong> &amp;&amp; v.equals(e.getValue());
<a class="jxr_linenumber" name="1380" href="#1380">1380</a>         }
<a class="jxr_linenumber" name="1381" href="#1381">1381</a> 
<a class="jxr_linenumber" name="1382" href="#1382">1382</a>         @Override
<a class="jxr_linenumber" name="1383" href="#1383">1383</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> remove(Object o) {
<a class="jxr_linenumber" name="1384" href="#1384">1384</a>             <strong class="jxr_keyword">if</strong> (!(o instanceof Map.Entry&lt;?, ?&gt;)) {
<a class="jxr_linenumber" name="1385" href="#1385">1385</a>                 <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="1386" href="#1386">1386</a>             }
<a class="jxr_linenumber" name="1387" href="#1387">1387</a>             Map.Entry&lt;?, ?&gt; e = (Map.Entry&lt;?, ?&gt;) o;
<a class="jxr_linenumber" name="1388" href="#1388">1388</a>             <strong class="jxr_keyword">return</strong> ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.remove(e.getKey(), e.getValue());
<a class="jxr_linenumber" name="1389" href="#1389">1389</a>         }
<a class="jxr_linenumber" name="1390" href="#1390">1390</a> 
<a class="jxr_linenumber" name="1391" href="#1391">1391</a>         @Override
<a class="jxr_linenumber" name="1392" href="#1392">1392</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> size() {
<a class="jxr_linenumber" name="1393" href="#1393">1393</a>             <strong class="jxr_keyword">return</strong> ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.size();
<a class="jxr_linenumber" name="1394" href="#1394">1394</a>         }
<a class="jxr_linenumber" name="1395" href="#1395">1395</a> 
<a class="jxr_linenumber" name="1396" href="#1396">1396</a>         @Override
<a class="jxr_linenumber" name="1397" href="#1397">1397</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isEmpty() {
<a class="jxr_linenumber" name="1398" href="#1398">1398</a>             <strong class="jxr_keyword">return</strong> ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.isEmpty();
<a class="jxr_linenumber" name="1399" href="#1399">1399</a>         }
<a class="jxr_linenumber" name="1400" href="#1400">1400</a> 
<a class="jxr_linenumber" name="1401" href="#1401">1401</a>         @Override
<a class="jxr_linenumber" name="1402" href="#1402">1402</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> clear() {
<a class="jxr_linenumber" name="1403" href="#1403">1403</a>             ConcurrentIdentityHashMap.<strong class="jxr_keyword">this</strong>.clear();
<a class="jxr_linenumber" name="1404" href="#1404">1404</a>         }
<a class="jxr_linenumber" name="1405" href="#1405">1405</a>     }
<a class="jxr_linenumber" name="1406" href="#1406">1406</a> }
</pre>
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